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0.6x+0.7(30-x)=19.6
We move all terms to the left:
0.6x+0.7(30-x)-(19.6)=0
We add all the numbers together, and all the variables
0.6x+0.7(-1x+30)-(19.6)=0
We add all the numbers together, and all the variables
0.6x+0.7(-1x+30)-19.6=0
We multiply parentheses
0.6x-0.7x+21-19.6=0
We add all the numbers together, and all the variables
-0.1x+1.4=0
We move all terms containing x to the left, all other terms to the right
-0.1x=-1.4
x=-1.4/-0.1
x=13+0.1/0.1
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