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21(x+3)=4x+1.74
We move all terms to the left:
21(x+3)-(4x+1.74)=0
We multiply parentheses
21x-(4x+1.74)+63=0
We get rid of parentheses
21x-4x-1.74+63=0
We add all the numbers together, and all the variables
17x+61.26=0
We move all terms containing x to the left, all other terms to the right
17x=-61.26
x=-61.26/17
x=-3+8.1428571428572/13.492063492064
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