13a+15-5a=-3a-18

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Solution for 13a+15-5a=-3a-18 equation:


Simplifying
13a + 15 + -5a = -3a + -18

Reorder the terms:
15 + 13a + -5a = -3a + -18

Combine like terms: 13a + -5a = 8a
15 + 8a = -3a + -18

Reorder the terms:
15 + 8a = -18 + -3a

Solving
15 + 8a = -18 + -3a

Solving for variable 'a'.

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

Add '3a' to each side of the equation.
15 + 8a + 3a = -18 + -3a + 3a

Combine like terms: 8a + 3a = 11a
15 + 11a = -18 + -3a + 3a

Combine like terms: -3a + 3a = 0
15 + 11a = -18 + 0
15 + 11a = -18

Add '-15' to each side of the equation.
15 + -15 + 11a = -18 + -15

Combine like terms: 15 + -15 = 0
0 + 11a = -18 + -15
11a = -18 + -15

Combine like terms: -18 + -15 = -33
11a = -33

Divide each side by '11'.
a = -3

Simplifying
a = -3

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