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90(2+3+e)=(4*5)
We move all terms to the left:
90(2+3+e)-((4*5))=0
We add all the numbers together, and all the variables
90(e+5)-(20)=0
We add all the numbers together, and all the variables
90(e+5)-20=0
We multiply parentheses
90e+450-20=0
We add all the numbers together, and all the variables
90e+430=0
We move all terms containing e to the left, all other terms to the right
90e=-430
e=-430/90
e=-4+7/9
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