7a-2a=20

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Solution for 7a-2a=20 equation: 


Simplifying
7a + -2a = 20

Combine like terms: 7a + -2a = 5a
5a = 20

Solving
5a = 20

Solving for variable 'a'.

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

Divide each side by '5'.
a = 4

Simplifying
a = 4

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