3(a+2)-7=13-(56)

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Solution for 3(a+2)-7=13-(56) equation:


Simplifying
3(a + 2) + -7 = 13 + -1(56)

Reorder the terms:
3(2 + a) + -7 = 13 + -1(56)
(2 * 3 + a * 3) + -7 = 13 + -1(56)
(6 + 3a) + -7 = 13 + -1(56)

Reorder the terms:
6 + -7 + 3a = 13 + -1(56)

Combine like terms: 6 + -7 = -1
-1 + 3a = 13 + -1(56)

Multiply -1 * 56
-1 + 3a = 13 + -56

Combine like terms: 13 + -56 = -43
-1 + 3a = -43

Solving
-1 + 3a = -43

Solving for variable 'a'.

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

Add '1' to each side of the equation.
-1 + 1 + 3a = -43 + 1

Combine like terms: -1 + 1 = 0
0 + 3a = -43 + 1
3a = -43 + 1

Combine like terms: -43 + 1 = -42
3a = -42

Divide each side by '3'.
a = -14

Simplifying
a = -14

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