3a+5-7a=

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Solution for 3a+5-7a= equation:


3a+5-7a=0

We simplify the equation to the form, which is simple to understand 
3a+5-7a=0

We move all terms containing a to the left and all other terms to the right. 
+3a-7a=0-5

We simplify left and right side of the equation. 
-4a=-5

We divide both sides of the equation by -4 to get a. 
a=1.25

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