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21=-2/3x-13
We move all terms to the left:
21-(-2/3x-13)=0
Domain of the equation: 3x-13)!=0We get rid of parentheses
x∈R
2/3x+13+21=0
We multiply all the terms by the denominator
13*3x+21*3x+2=0
Wy multiply elements
39x+63x+2=0
We add all the numbers together, and all the variables
102x+2=0
We move all terms containing x to the left, all other terms to the right
102x=-2
x=-2/102
x=-1/51
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