2a-8=15a-21

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Solution for 2a-8=15a-21 equation:


Simplifying
2a + -8 = 15a + -21

Reorder the terms:
-8 + 2a = 15a + -21

Reorder the terms:
-8 + 2a = -21 + 15a

Solving
-8 + 2a = -21 + 15a

Solving for variable 'a'.

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

Add '-15a' to each side of the equation.
-8 + 2a + -15a = -21 + 15a + -15a

Combine like terms: 2a + -15a = -13a
-8 + -13a = -21 + 15a + -15a

Combine like terms: 15a + -15a = 0
-8 + -13a = -21 + 0
-8 + -13a = -21

Add '8' to each side of the equation.
-8 + 8 + -13a = -21 + 8

Combine like terms: -8 + 8 = 0
0 + -13a = -21 + 8
-13a = -21 + 8

Combine like terms: -21 + 8 = -13
-13a = -13

Divide each side by '-13'.
a = 1

Simplifying
a = 1

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