12.4=a+7.9

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Solution for 12.4=a+7.9 equation:


Simplifying
12.4 = a + 7.9

Reorder the terms:
12.4 = 7.9 + a

Solving
12.4 = 7.9 + 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.
12.4 + -1a = 7.9 + a + -1a

Combine like terms: a + -1a = 0
12.4 + -1a = 7.9 + 0
12.4 + -1a = 7.9

Add '-12.4' to each side of the equation.
12.4 + -12.4 + -1a = 7.9 + -12.4

Combine like terms: 12.4 + -12.4 = 0.0
0.0 + -1a = 7.9 + -12.4
-1a = 7.9 + -12.4

Combine like terms: 7.9 + -12.4 = -4.5
-1a = -4.5

Divide each side by '-1'.
a = 4.5

Simplifying
a = 4.5

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