5a+12=8a-15

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Solution for 5a+12=8a-15 equation:


Simplifying
5a + 12 = 8a + -15

Reorder the terms:
12 + 5a = 8a + -15

Reorder the terms:
12 + 5a = -15 + 8a

Solving
12 + 5a = -15 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
12 + 5a + -8a = -15 + 8a + -8a

Combine like terms: 5a + -8a = -3a
12 + -3a = -15 + 8a + -8a

Combine like terms: 8a + -8a = 0
12 + -3a = -15 + 0
12 + -3a = -15

Add '-12' to each side of the equation.
12 + -12 + -3a = -15 + -12

Combine like terms: 12 + -12 = 0
0 + -3a = -15 + -12
-3a = -15 + -12

Combine like terms: -15 + -12 = -27
-3a = -27

Divide each side by '-3'.
a = 9

Simplifying
a = 9

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