The square binary system of equations 3x 14y 2, 8x 7y 11 elimination

3x-5z=6(1) is substituted with z=-3 for (2)x+4z=-15(2)x=-15-4*(-3) obtained from (2), x=-15-4z(3)x=-15+12 is substituted for (1) with (3), x=-33(-15-4z)-5z=6, so: x=-3,z=-3-45-12z-5z=6-45-17z=6-17z=6+45z=-32When using addition and subtraction, subtraction is used for two numbers with the same sign, and addition is used for different signs.

I don't have time, so I can't answer all your questions.

The answer is x=7,y=-5Step 1: Equalize 5x=-7yx=(-7 5)yStep 2: Isotropize 10x+16y=-1010x(-7 5)y+16y=-10Step 3:

Solve the equation -14y+16y=-102y=-10y=-5 and bring y=-5 into the original formula 5x=-7y5x=35x=7 [Note: the calculation needs to be checked after the solution].

Convert it to a standard form first:

4x-3y=17

5x+y=7

Multiply the second formula by 3 and add the two blocks to get it.

19x=38

So rotten x=2

Then just substitute one of the formulas to get the hunger balance y=-3

4x+3y=17——1

2x+4y=16 - collapse 2

1-(2x2) first circle: (4x+3y)-(4x+8y)=17-325y=-15

y=3 generationsy=3 into 2:

2x+4(3)=16

2x+12=16

x=2 x=2, y=3

3x+4y=28①

4x+3y=7 burning stool.

4 -3 gives 7y91, i.e. liquid Zen y=13

The reverse substitution buries the brigade back x=-8,4, by 1*3

Subtract from 2*4, 2, x=-8

y=13,2, add x+y=5

Subtract y-x=21

The solution is x=-8, y=13,1,

2x-3y=8 (1)

7x-5y=-5 (2)

1) Multiply 5 to get 10x-15y=40 (3)2) Multiply 3 to get 21x-15y=-15 (4)4)-(3).

11x=-55

x=-5 substitution (1) gets: Senwang Cave.

10-3y=8

3y=-18

y=-6 so the solution is: this withered.

x=-5y=-6

6x-3y=-3 ①

5x-9y=-35 Slow Opening.

3- Gotcha. 13x=26

x = 2 years of disturbance x = 2 generations.

10-9y=-35

9y=-45

y=5 The solution of this system of equations is dug as.

x=2y=5

Multiply all the terms of the first equation by 2 to be 10x-8y=14....First, multiply all items in the second formula by 5 is 10x+15y=60....Second, use two minus one to eliminate the game, once you drop x items, solve y, and then bring y to any formula, you will be defeated and y.

Description The capital one and two are the first formula and the second formula.