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35=2/3x+21
We move all terms to the left:
35-(2/3x+21)=0
Domain of the equation: 3x+21)!=0We get rid of parentheses
x∈R
-2/3x-21+35=0
We multiply all the terms by the denominator
-21*3x+35*3x-2=0
Wy multiply elements
-63x+105x-2=0
We add all the numbers together, and all the variables
42x-2=0
We move all terms containing x to the left, all other terms to the right
42x=2
x=2/42
x=1/21
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