-159=-3(7a-1)+6

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Solution for -159=-3(7a-1)+6 equation:


Simplifying
-159 = -3(7a + -1) + 6

Reorder the terms:
-159 = -3(-1 + 7a) + 6
-159 = (-1 * -3 + 7a * -3) + 6
-159 = (3 + -21a) + 6

Reorder the terms:
-159 = 3 + 6 + -21a

Combine like terms: 3 + 6 = 9
-159 = 9 + -21a

Solving
-159 = 9 + -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.
-159 + 21a = 9 + -21a + 21a

Combine like terms: -21a + 21a = 0
-159 + 21a = 9 + 0
-159 + 21a = 9

Add '159' to each side of the equation.
-159 + 159 + 21a = 9 + 159

Combine like terms: -159 + 159 = 0
0 + 21a = 9 + 159
21a = 9 + 159

Combine like terms: 9 + 159 = 168
21a = 168

Divide each side by '21'.
a = 8

Simplifying
a = 8

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