3a-27=8a-42

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Solution for 3a-27=8a-42 equation:


Simplifying
3a + -27 = 8a + -42

Reorder the terms:
-27 + 3a = 8a + -42

Reorder the terms:
-27 + 3a = -42 + 8a

Solving
-27 + 3a = -42 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
-27 + 3a + -8a = -42 + 8a + -8a

Combine like terms: 3a + -8a = -5a
-27 + -5a = -42 + 8a + -8a

Combine like terms: 8a + -8a = 0
-27 + -5a = -42 + 0
-27 + -5a = -42

Add '27' to each side of the equation.
-27 + 27 + -5a = -42 + 27

Combine like terms: -27 + 27 = 0
0 + -5a = -42 + 27
-5a = -42 + 27

Combine like terms: -42 + 27 = -15
-5a = -15

Divide each side by '-5'.
a = 3

Simplifying
a = 3

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