-42=-3(6-a)

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Solution for -42=-3(6-a) equation:


Simplifying
-42 = -3(6 + -1a)
-42 = (6 * -3 + -1a * -3)
-42 = (-18 + 3a)

Solving
-42 = -18 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-42 + -3a = -18 + 3a + -3a

Combine like terms: 3a + -3a = 0
-42 + -3a = -18 + 0
-42 + -3a = -18

Add '42' to each side of the equation.
-42 + 42 + -3a = -18 + 42

Combine like terms: -42 + 42 = 0
0 + -3a = -18 + 42
-3a = -18 + 42

Combine like terms: -18 + 42 = 24
-3a = 24

Divide each side by '-3'.
a = -8

Simplifying
a = -8

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