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90=90-(5x+13)
We move all terms to the left:
90-(90-(5x+13))=0
We calculate terms in parentheses: -(90-(5x+13)), so:We get rid of parentheses
90-(5x+13)
determiningTheFunctionDomain -(5x+13)+90
We get rid of parentheses
-5x-13+90
We add all the numbers together, and all the variables
-5x+77
Back to the equation:
-(-5x+77)
5x-77+90=0
We add all the numbers together, and all the variables
5x+13=0
We move all terms containing x to the left, all other terms to the right
5x=-13
x=-13/5
x=-2+3/5
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