x 2y 70 6x 5y 280, the process of solving the problem Rush Rush !!!!!!!Rush

Method 1: x+2y=70, x=70-2y

Solution: y=20

Then x=70-2y=70-2*20=30

So: x=30, y=20

Method 2: Let x+2y=70 be the formula.

6x+5y=280 is the formula.

6:6x+12y=420……Style.

：7y=140

So: y=20

then it is easy to obtain: x=30

The first equation can become: ( 70-x) 2=y, and substituting y into y, which can be converted into solving a simple unary equation.

Solution: x-6y=54, 9x-2y=70

3- gets: 3(9x-2y)-x+6y=3 70-54, 26x=156, solution: x=6

Substituting x=6 into yields: 6-6y=54, and the solution gets: y=-8, so x=6, y=-8

The solution of the equation is x=160, y=120Step 3

9x+6y=2160.

8x-6y=560 ④

17x=2720

x=2720÷17

x = 160 put the orange section x = 160 into Sun Wufu

480+2y=720

2y=240

y=120So the solution of the equation isx=160，y=120

3x+2y=720 （1）

4x-3y=280 (2) Source Skin.

Hail difference 1) 3+(2) 2, get:

17x=2160+560

x=2720÷17

x=160y=(720-160 3) 2y=(720-480) 2

y=240÷2

y=120

Summary. Hello: Dear, solution: 2x+4y=150, 2x=150-4yx=75-2y

Substitut 1 into 2,6x+3y=270

6×（75-2y）+3y=270。

What is the solution of 2x+4y=150+6x+3y=270.

Hello Qianrot Hui: Pro, Hui answer: 2x+4y=150, 2x=150-4y x=75-2y, 1 generation of calendar jujube into 2,6x+3y=2706 (75-2y)+3y=270.

x is equal to how much.

450-12y+3y=270450-9y=2709y=450-2709y=180y=180 9y=20,x=75-40=35 so finally x=35,y=20! Kiss.

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Other. This is a binary system of equations that we can solve using the elimination method.

First, shift the x term in the first equation and the 2x term in the second equation to get the following equation:

x + 2y = 70 （1）

2x + 3y = 120 （2）

Then multiply the x in the first equation by 2 to get 2x + 4y = 140, so that the system of equations becomes:

2x + 4y = 140 （3）

2x + 3y = 120 （2）

Then multiply the second equation by -2 to get -4x - 6y = 240, so that the system of equations becomes:

2x + 4y = 140 （3）

4x - 6y = 240 （4）

Then divide the fourth equation by -2 to get 2x + 3y = 120, so that the system of equations becomes:

2x + 4y = 140 （3）

2x + 3y = 120 （2）

Now we can subtract the second equation from the third equation and subtract the term of x to get y = 10. Substituting the value of y into the first equation gives us the value of x:

x + 2y = 70

x + 2(10) =70

x = 50

Therefore, the solution of the system of equations is x=50, y=10.

3x+2y=70 （1）

2x+3y=120 （2）

2)-(1)De:

y - x=50 （3）

2) + (1) Knowing the Rock Knows:

5x+5y=190

x+y=38 （4）

3) + (4) get:

2y=88y=44 Substitution (3):

x=y-50= -6

Summary. I got it smoothly.

x=13 and then substitute into Equation 1.

You can find y=21

2x+y=47,20x+30x+70y=2120 Hello, it's a pleasure to help you solve the equation, I hope you can wait a while, it's being calculated now, and you'll be given the correct answer <> later

There are steps no. <>

There are steps, don't worry.

x=13y=21

First of all, we need to simplify Equation 2.

Equation 2 is equal to 5x+7 y=212

Then multiply Equation 1 by 7 and reduce Equation 2 so that Y can be eliminated smoothly.

Successfully get x=13 and then substitute equation one to find y=21, have you learned?

2x - 5y = 0

6x+2y=102

The following formula minus 3 times the upper gear shield bucket grinding and destroying formula yields 17y = 102, y = 6, x = 15