Just want to make sure I got it right..?

Question

9(x+8) = 5[x - (7-x)]

I got x=107...is that right?

Answer 1

Since x is on the right-hand side of the equation, switch the sides so it is on the left-hand side of the equation.

5[x-(7-x)]=9(x+8)

Reorder the polynomial 7-x alphabetically from left to right, starting with the highest order term.

5(x-(-x+7))=9(x+8)

Complete the multiplication of 9 by each term inside the parenthesis.

5(x-(-x+7))=(9x+72)

Remove the parenthesis around the expression 9x+72.

5(x-(-x+7))=9x+72

Complete the multiplication of -1 by each term inside the parenthesis.

5(x+(x-7))=9x+72

Since x and x are like terms, add x to x to get 2x.

5(2x-7)=9x+72

Complete the multiplication of 5 by each term inside the parenthesis.

(10x-35)=9x+72

Remove the parenthesis around the expression 10x-35.

10x-35=9x+72

Since 9x contains the variable to solve for, move it to the left-hand side of the equation by subtracting 9x from both sides.

10x-35-9x=72

Since 10x and -9x are like terms, add -9x to 10x to get x.

x-35=72

Since -35 does not contain the variable to solve for, move it to the right-hand side of the equation by adding 35 to both sides.

x=35+72

Add 72 to 35 to get 107.

x=107  

Answer 2

yes u r right,,

x=107

Answer 3

9x + 72 = 10x - 35

=> x = 107

You are correct.

Answer 4

9x+72=5x-5(7-x)

4x+72=-35+5x

-x=-107

x=107

Answer 5

yes it is right

Answer 6

right

good answer