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-4(p-90)=-28
We move all terms to the left:
-4(p-90)-(-28)=0
We add all the numbers together, and all the variables
-4(p-90)+28=0
We multiply parentheses
-4p+360+28=0
We add all the numbers together, and all the variables
-4p+388=0
We move all terms containing p to the left, all other terms to the right
-4p=-388
p=-388/-4
p=+97
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