3a+2a=20+25

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Solution for 3a+2a=20+25 equation: 



3a+2a=20+25

We move all terms to the left:

3a+2a-(20+25)=0

We add all the numbers together, and all the variables

3a+2a-45=0

We add all the numbers together, and all the variables

5a-45=0

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

5a=45

a=45/5

a=9

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