Question

What is the solution to the equation? -8x + 9x - 21= -12-16 x= ? I got 7 on this one too

Answer 1

Simplifying
-8x + 9x + -21 = -12 + -16

Reorder the terms:
-21 + -8x + 9x = -12 + -16

Combine like terms: -8x + 9x = 1x
-21 + 1x = -12 + -16

Combine like terms: -12 + -16 = -28
-21 + 1x = -28

Solving
-21 + 1x = -28

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + 21 + 1x = -28 + 21

Combine like terms: -21 + 21 = 0
0 + 1x = -28 + 21
1x = -28 + 21

Combine like terms: -28 + 21 = -7
1x = -7

Divide each side by '1'.
x = -7

Simplifying
x = -7 Is ur answer!

Answer 2

Thank You again :)

Answer 3

Ur welcome!