-42-18=15a

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Solution for -42-18=15a equation:


Simplifying
-42 + -18 = 15a

Combine like terms: -42 + -18 = -60
-60 = 15a

Solving
-60 = 15a

Solving for variable 'a'.

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

Add '-15a' to each side of the equation.
-60 + -15a = 15a + -15a

Combine like terms: 15a + -15a = 0
-60 + -15a = 0

Add '60' to each side of the equation.
-60 + 60 + -15a = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -15a = 0 + 60
-15a = 0 + 60

Combine like terms: 0 + 60 = 60
-15a = 60

Divide each side by '-15'.
a = -4

Simplifying
a = -4

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