-123=3(-7a-6)

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Solution for -123=3(-7a-6) equation:


Simplifying
-123 = 3(-7a + -6)

Reorder the terms:
-123 = 3(-6 + -7a)
-123 = (-6 * 3 + -7a * 3)
-123 = (-18 + -21a)

Solving
-123 = -18 + -21a

Solving for variable 'a'.

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

Add '21a' to each side of the equation.
-123 + 21a = -18 + -21a + 21a

Combine like terms: -21a + 21a = 0
-123 + 21a = -18 + 0
-123 + 21a = -18

Add '123' to each side of the equation.
-123 + 123 + 21a = -18 + 123

Combine like terms: -123 + 123 = 0
0 + 21a = -18 + 123
21a = -18 + 123

Combine like terms: -18 + 123 = 105
21a = 105

Divide each side by '21'.
a = 5

Simplifying
a = 5

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