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0.7(5a-13)=a
We move all terms to the left:
0.7(5a-13)-(a)=0
We add all the numbers together, and all the variables
-1a+0.7(5a-13)=0
We multiply parentheses
-1a+3.5a-9.1=0
We add all the numbers together, and all the variables
2.5a-9.1=0
We move all terms containing a to the left, all other terms to the right
2.5a=9.1
a=9.1/2.5
a=3+1/1.5625
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