How do you solve the equation 6x 12 9x 15?

Solution: 6x-6x+12=9x-15-6x

12=3x-15

12+15=3x-15+15

3x=273x÷3=27÷3

x=9 parsing:

Adding (or subtracting) the same number or the same integer to both sides of the equation is equivalent to moving some terms in the equation from one side of the equation to the other after changing the sign, and this deformation is called shifting. Note: "Shift" refers to moving an term of an equation from the left to the right or from the right to the left.

The shift is based on the law of subtraction: a-b = a+(-b), i.e. subtracting a number is equal to adding the opposite of the number. When we want to move a term on the left (such as x) to the right, we actually subtract the term (x) on the left, and according to the principle of the same solution, we must also subtract this term from the right, and then according to the law of subtraction, the opposite number of this (x) must be added to the right, so after the left term (x) is subtracted (from there to nothing), his opposite number appears on the right (from nothing to nothing).

It feels like the item on the left has changed the symbol and moved to the right. It's the same thing to move some of the terms on the right side of the equation to the left. This is the move item.

1.Derivative, the interval with a derivative greater than 0 is an increasing function, and the interval with a function less than 0 is a decreasing function.

f‘（x）=-3x^2-6x+9

To the right of the axis of symmetry is the increase interval. On the left is the minus interval.

2.According to the distribution of the increase and decrease intervals, the extreme points are found, and the extreme points and endpoints in [-2,2] are substituted into the function, and the smallest value in the middle of them is the minimum value of the function in the interval.

Summary. Kiss is happy to solve the problem for you :6x-16:

5x+4=10:9Solution:(6x—16):

5x+4）×9×（5x+4）=10：9×9×（5x+4）（6x—16）×9=10×（5x+4）54x—144=50x+4054 x—50x—144+144=50x—50x+40+1444x=1844x÷4=184÷4x=46

6x-16:5x+4=10:9

Solve equations. Solve equations.

6x-16:5x+4=10:9

Solve equations. 6x-16:5x+4=10:9

Solve equations. 6x-16:5x+4=10:9

Solve equations. 6x-16:5x+4=10:9

Solve equations.

Summary. 9x-6=15 to solve the equation.

If there are 10 more boys than girls, then there are 10 fewer girls than boys, right?

By the way<> are you typing less, it's 10.

If it's the latter, it's wrong.

9 correct. 10 questions are wrong.

Is question 10 correct?

If 10 questions are wrong, it cannot be said that the number of girls is 1 5 less than that of boys

Summary. 12x-9x=6, 3x=6, solve the equation x=212x-9x=6.

Hello, solution x=2

The process is as follows, you can take a look.

12x-9x=6, 3x=6, and x=2

9x-108=6x,3x=108,x=36,10, unwrapping parentheses 9x-108=6x

Shift 9x-6x=108

Merge homogeneous items 3x=108

The coefficient is turned into a bucket shout 1 x = 36,2, and the empty parentheses are as empty as wild brackets, and 9x-108 = 6x shift terms are obtained, and 9x-6x = 108 is obtained

Combine similar terms to get 3x=108

Both sides are divided by 3 at the same time, and x=36 is obtained

It may be wrong to add points if it is right, 1,