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

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


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

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

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

Combine like terms: 6 + -7 = -1
-1 + 3a = 13 + -1(a + 2)

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

Combine like terms: 13 + -2 = 11
-1 + 3a = 11 + -1a

Solving
-1 + 3a = 11 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-1 + 3a + a = 11 + -1a + a

Combine like terms: 3a + a = 4a
-1 + 4a = 11 + -1a + a

Combine like terms: -1a + a = 0
-1 + 4a = 11 + 0
-1 + 4a = 11

Add '1' to each side of the equation.
-1 + 1 + 4a = 11 + 1

Combine like terms: -1 + 1 = 0
0 + 4a = 11 + 1
4a = 11 + 1

Combine like terms: 11 + 1 = 12
4a = 12

Divide each side by '4'.
a = 3

Simplifying
a = 3

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