-3(1+5a)=87

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Solution for -3(1+5a)=87 equation: 


Simplifying
-3(1 + 5a) = 87
(1 * -3 + 5a * -3) = 87
(-3 + -15a) = 87

Solving
-3 + -15a = 87

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + -15a = 87 + 3

Combine like terms: -3 + 3 = 0
0 + -15a = 87 + 3
-15a = 87 + 3

Combine like terms: 87 + 3 = 90
-15a = 90

Divide each side by '-15'.
a = -6

Simplifying
a = -6

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