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21+3/5+3=4x
We move all terms to the left:
21+3/5+3-(4x)=0
We add all the numbers together, and all the variables
-4x+24+3/5=0
We multiply all the terms by the denominator
-4x*5+3+24*5=0
We add all the numbers together, and all the variables
-4x*5+123=0
Wy multiply elements
-20x+123=0
We move all terms containing x to the left, all other terms to the right
-20x=-123
x=-123/-20
x=6+3/20
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