4a-40=20

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Solution for 4a-40=20 equation: 


Simplifying
4a + -40 = 20

Reorder the terms:
-40 + 4a = 20

Solving
-40 + 4a = 20

Solving for variable 'a'.

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

Add '40' to each side of the equation.
-40 + 40 + 4a = 20 + 40

Combine like terms: -40 + 40 = 0
0 + 4a = 20 + 40
4a = 20 + 40

Combine like terms: 20 + 40 = 60
4a = 60

Divide each side by '4'.
a = 15

Simplifying
a = 15

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