-91=7x+3x+9

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Solution for -91=7x+3x+9 equation:


Simplifying
-91 = 7x + 3x + 9

Reorder the terms:
-91 = 9 + 7x + 3x

Combine like terms: 7x + 3x = 10x
-91 = 9 + 10x

Solving
-91 = 9 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
-91 + -10x = 9 + 10x + -10x

Combine like terms: 10x + -10x = 0
-91 + -10x = 9 + 0
-91 + -10x = 9

Add '91' to each side of the equation.
-91 + 91 + -10x = 9 + 91

Combine like terms: -91 + 91 = 0
0 + -10x = 9 + 91
-10x = 9 + 91

Combine like terms: 9 + 91 = 100
-10x = 100

Divide each side by '-10'.
x = -10

Simplifying
x = -10

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