18-7a=39

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Solution for 18-7a=39 equation: 


Simplifying
18 + -7a = 39

Solving
18 + -7a = 39

Solving for variable 'a'.

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

Add '-18' to each side of the equation.
18 + -18 + -7a = 39 + -18

Combine like terms: 18 + -18 = 0
0 + -7a = 39 + -18
-7a = 39 + -18

Combine like terms: 39 + -18 = 21
-7a = 21

Divide each side by '-7'.
a = -3

Simplifying
a = -3

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