6a-(a-7)=-18

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Solution for 6a-(a-7)=-18 equation:


Simplifying
6a + -1(a + -7) = -18

Reorder the terms:
6a + -1(-7 + a) = -18
6a + (-7 * -1 + a * -1) = -18
6a + (7 + -1a) = -18

Reorder the terms:
7 + 6a + -1a = -18

Combine like terms: 6a + -1a = 5a
7 + 5a = -18

Solving
7 + 5a = -18

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + 5a = -18 + -7

Combine like terms: 7 + -7 = 0
0 + 5a = -18 + -7
5a = -18 + -7

Combine like terms: -18 + -7 = -25
5a = -25

Divide each side by '5'.
a = -5

Simplifying
a = -5

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