-91=3(3-8a)-a

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Solution for -91=3(3-8a)-a equation:


Simplifying
-91 = 3(3 + -8a) + -1a
-91 = (3 * 3 + -8a * 3) + -1a
-91 = (9 + -24a) + -1a

Combine like terms: -24a + -1a = -25a
-91 = 9 + -25a

Solving
-91 = 9 + -25a

Solving for variable 'a'.

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

Add '25a' to each side of the equation.
-91 + 25a = 9 + -25a + 25a

Combine like terms: -25a + 25a = 0
-91 + 25a = 9 + 0
-91 + 25a = 9

Add '91' to each side of the equation.
-91 + 91 + 25a = 9 + 91

Combine like terms: -91 + 91 = 0
0 + 25a = 9 + 91
25a = 9 + 91

Combine like terms: 9 + 91 = 100
25a = 100

Divide each side by '25'.
a = 4

Simplifying
a = 4

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