-(7-2a)-(a+12)=-18

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Solution for -(7-2a)-(a+12)=-18 equation:


Simplifying
-1(7 + -2a) + -1(a + 12) = -18
(7 * -1 + -2a * -1) + -1(a + 12) = -18
(-7 + 2a) + -1(a + 12) = -18

Reorder the terms:
-7 + 2a + -1(12 + a) = -18
-7 + 2a + (12 * -1 + a * -1) = -18
-7 + 2a + (-12 + -1a) = -18

Reorder the terms:
-7 + -12 + 2a + -1a = -18

Combine like terms: -7 + -12 = -19
-19 + 2a + -1a = -18

Combine like terms: 2a + -1a = 1a
-19 + 1a = -18

Solving
-19 + 1a = -18

Solving for variable 'a'.

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

Add '19' to each side of the equation.
-19 + 19 + 1a = -18 + 19

Combine like terms: -19 + 19 = 0
0 + 1a = -18 + 19
1a = -18 + 19

Combine like terms: -18 + 19 = 1
1a = 1

Divide each side by '1'.
a = 1

Simplifying
a = 1

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