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0.2(x+30)-0.07(x-60)=6.3
We move all terms to the left:
0.2(x+30)-0.07(x-60)-(6.3)=0
We add all the numbers together, and all the variables
0.2(x+30)-0.07(x-60)-6.3=0
We multiply parentheses
0.2x-0.07x+6+4.2-6.3=0
We add all the numbers together, and all the variables
0.13x+3.9=0
We move all terms containing x to the left, all other terms to the right
0.13x=-3.9
x=-3.9/0.13
x=-30+-4.4408920985006E-16/0.13
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