-3a-13=a+7

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Solution for -3a-13=a+7 equation:


Simplifying
-3a + -13 = a + 7

Reorder the terms:
-13 + -3a = a + 7

Reorder the terms:
-13 + -3a = 7 + a

Solving
-13 + -3a = 7 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-13 + -3a + -1a = 7 + a + -1a

Combine like terms: -3a + -1a = -4a
-13 + -4a = 7 + a + -1a

Combine like terms: a + -1a = 0
-13 + -4a = 7 + 0
-13 + -4a = 7

Add '13' to each side of the equation.
-13 + 13 + -4a = 7 + 13

Combine like terms: -13 + 13 = 0
0 + -4a = 7 + 13
-4a = 7 + 13

Combine like terms: 7 + 13 = 20
-4a = 20

Divide each side by '-4'.
a = -5

Simplifying
a = -5

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