-7x+7(-3x-15)=91

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Solution for -7x+7(-3x-15)=91 equation:


Simplifying
-7x + 7(-3x + -15) = 91

Reorder the terms:
-7x + 7(-15 + -3x) = 91
-7x + (-15 * 7 + -3x * 7) = 91
-7x + (-105 + -21x) = 91

Reorder the terms:
-105 + -7x + -21x = 91

Combine like terms: -7x + -21x = -28x
-105 + -28x = 91

Solving
-105 + -28x = 91

Solving for variable 'x'.

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

Add '105' to each side of the equation.
-105 + 105 + -28x = 91 + 105

Combine like terms: -105 + 105 = 0
0 + -28x = 91 + 105
-28x = 91 + 105

Combine like terms: 91 + 105 = 196
-28x = 196

Divide each side by '-28'.
x = -7

Simplifying
x = -7

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