2(a-9)=42-8a

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Solution for 2(a-9)=42-8a equation:


Simplifying
2(a + -9) = 42 + -8a

Reorder the terms:
2(-9 + a) = 42 + -8a
(-9 * 2 + a * 2) = 42 + -8a
(-18 + 2a) = 42 + -8a

Solving
-18 + 2a = 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.
-18 + 2a + 8a = 42 + -8a + 8a

Combine like terms: 2a + 8a = 10a
-18 + 10a = 42 + -8a + 8a

Combine like terms: -8a + 8a = 0
-18 + 10a = 42 + 0
-18 + 10a = 42

Add '18' to each side of the equation.
-18 + 18 + 10a = 42 + 18

Combine like terms: -18 + 18 = 0
0 + 10a = 42 + 18
10a = 42 + 18

Combine like terms: 42 + 18 = 60
10a = 60

Divide each side by '10'.
a = 6

Simplifying
a = 6

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