-91=-4(-6+7a)-3

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Solution for -91=-4(-6+7a)-3 equation:


Simplifying
-91 = -4(-6 + 7a) + -3
-91 = (-6 * -4 + 7a * -4) + -3
-91 = (24 + -28a) + -3

Reorder the terms:
-91 = 24 + -3 + -28a

Combine like terms: 24 + -3 = 21
-91 = 21 + -28a

Solving
-91 = 21 + -28a

Solving for variable 'a'.

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

Add '28a' to each side of the equation.
-91 + 28a = 21 + -28a + 28a

Combine like terms: -28a + 28a = 0
-91 + 28a = 21 + 0
-91 + 28a = 21

Add '91' to each side of the equation.
-91 + 91 + 28a = 21 + 91

Combine like terms: -91 + 91 = 0
0 + 28a = 21 + 91
28a = 21 + 91

Combine like terms: 21 + 91 = 112
28a = 112

Divide each side by '28'.
a = 4

Simplifying
a = 4

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