3a+a+15=225

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Solution for 3a+a+15=225 equation: 



3a+a+15=225

We move all terms to the left:

3a+a+15-(225)=0

We add all the numbers together, and all the variables

4a-210=0

We move all terms containing a to the left, all other terms to the right

4a=210

a=210/4

a=52+1/2

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