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a+(a+17/2)=90
We move all terms to the left:
a+(a+17/2)-(90)=0
We add all the numbers together, and all the variables
a+(+a+17/2)-90=0
We get rid of parentheses
a+a-90+17/2=0
We multiply all the terms by the denominator
a*2+a*2+17-90*2=0
We add all the numbers together, and all the variables
a*2+a*2-163=0
Wy multiply elements
2a+2a-163=0
We add all the numbers together, and all the variables
4a-163=0
We move all terms containing a to the left, all other terms to the right
4a=163
a=163/4
a=40+3/4
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