8-2a=7a-28

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Solution for 8-2a=7a-28 equation:


Simplifying
8 + -2a = 7a + -28

Reorder the terms:
8 + -2a = -28 + 7a

Solving
8 + -2a = -28 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
8 + -2a + -7a = -28 + 7a + -7a

Combine like terms: -2a + -7a = -9a
8 + -9a = -28 + 7a + -7a

Combine like terms: 7a + -7a = 0
8 + -9a = -28 + 0
8 + -9a = -28

Add '-8' to each side of the equation.
8 + -8 + -9a = -28 + -8

Combine like terms: 8 + -8 = 0
0 + -9a = -28 + -8
-9a = -28 + -8

Combine like terms: -28 + -8 = -36
-9a = -36

Divide each side by '-9'.
a = 4

Simplifying
a = 4

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