-7x+9+8x=-20+21

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Solution for -7x+9+8x=-20+21 equation:


Simplifying
-7x + 9 + 8x = -20 + 21

Reorder the terms:
9 + -7x + 8x = -20 + 21

Combine like terms: -7x + 8x = 1x
9 + 1x = -20 + 21

Combine like terms: -20 + 21 = 1
9 + 1x = 1

Solving
9 + 1x = 1

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 1x = 1 + -9

Combine like terms: 9 + -9 = 0
0 + 1x = 1 + -9
1x = 1 + -9

Combine like terms: 1 + -9 = -8
1x = -8

Divide each side by '1'.
x = -8

Simplifying
x = -8

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