-3a+7a=15+45

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Solution for -3a+7a=15+45 equation: 


Simplifying
-3a + 7a = 15 + 45

Combine like terms: -3a + 7a = 4a
4a = 15 + 45

Combine like terms: 15 + 45 = 60
4a = 60

Solving
4a = 60

Solving for variable 'a'.

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

Divide each side by '4'.
a = 15

Simplifying
a = 15

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