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0.3(x+10)-0.02(x-30)=9.2
We move all terms to the left:
0.3(x+10)-0.02(x-30)-(9.2)=0
We add all the numbers together, and all the variables
0.3(x+10)-0.02(x-30)-9.2=0
We multiply parentheses
0.3x-0.02x+3+0.6-9.2=0
We add all the numbers together, and all the variables
0.28x-5.6=0
We move all terms containing x to the left, all other terms to the right
0.28x=5.6
x=5.6/0.28
x=19+0.28/0.28
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