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0.2x+0.9(12-x)=5.9
We move all terms to the left:
0.2x+0.9(12-x)-(5.9)=0
We add all the numbers together, and all the variables
0.2x+0.9(-1x+12)-(5.9)=0
We add all the numbers together, and all the variables
0.2x+0.9(-1x+12)-5.9=0
We multiply parentheses
0.2x-0.9x+10.8-5.9=0
We add all the numbers together, and all the variables
-0.7x+4.9=0
We move all terms containing x to the left, all other terms to the right
-0.7x=-4.9
x=-4.9/-0.7
x=7+8.8817841970013E-16/0.7
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