12a+4a+9a=100

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Solution for 12a+4a+9a=100 equation:


12a+4a+9a=100

We simplify the equation to the form, which is simple to understand 
12a+4a+9a=100

We move all terms containing a to the left and all other terms to the right. 
+12a+4a+9a=+100

We simplify left and right side of the equation. 
+25a=+100

We divide both sides of the equation by 25 to get a. 
a=4

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