10-a=20-28

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Solution for 10-a=20-28 equation:


Simplifying
10 + -1a = 20 + -28

Combine like terms: 20 + -28 = -8
10 + -1a = -8

Solving
10 + -1a = -8

Solving for variable 'a'.

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

Add '-10' to each side of the equation.
10 + -10 + -1a = -8 + -10

Combine like terms: 10 + -10 = 0
0 + -1a = -8 + -10
-1a = -8 + -10

Combine like terms: -8 + -10 = -18
-1a = -18

Divide each side by '-1'.
a = 18

Simplifying
a = 18

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