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4=(15+x)-4/5+12
We move all terms to the left:
4-((15+x)-4/5+12)=0
We add all the numbers together, and all the variables
-((x+15)-4/5+12)+4=0
We multiply all the terms by the denominator
-((x+15)-4+4*5+12)=0
We calculate terms in parentheses: -((x+15)-4+4*5+12), so:We get rid of parentheses
(x+15)-4+4*5+12
determiningTheFunctionDomain (x+15)-4+12+4*5
We add all the numbers together, and all the variables
(x+15)+28
We get rid of parentheses
x+15+28
We add all the numbers together, and all the variables
x+43
Back to the equation:
-(x+43)
-x-43=0
We add all the numbers together, and all the variables
-1x-43=0
We move all terms containing x to the left, all other terms to the right
-x=43
x=43/-1
x=-43
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