7(-8+3a)=-140

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Solution for 7(-8+3a)=-140 equation: 


Simplifying
7(-8 + 3a) = -140
(-8 * 7 + 3a * 7) = -140
(-56 + 21a) = -140

Solving
-56 + 21a = -140

Solving for variable 'a'.

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

Add '56' to each side of the equation.
-56 + 56 + 21a = -140 + 56

Combine like terms: -56 + 56 = 0
0 + 21a = -140 + 56
21a = -140 + 56

Combine like terms: -140 + 56 = -84
21a = -84

Divide each side by '21'.
a = -4

Simplifying
a = -4

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