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a/2+a+75=180
We move all terms to the left:
a/2+a+75-(180)=0
We add all the numbers together, and all the variables
a+a/2-105=0
We multiply all the terms by the denominator
a*2+a-105*2=0
We add all the numbers together, and all the variables
a+a*2-210=0
Wy multiply elements
a+2a-210=0
We add all the numbers together, and all the variables
3a-210=0
We move all terms containing a to the left, all other terms to the right
3a=210
a=210/3
a=70
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