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0.75x+0.05(4-x)=0.10(30)
We move all terms to the left:
0.75x+0.05(4-x)-(0.10(30))=0
We add all the numbers together, and all the variables
0.75x+0.05(-1x+4)-(0.103)=0
We add all the numbers together, and all the variables
0.75x+0.05(-1x+4)-0.103=0
We multiply parentheses
0.75x-0.05x+0.2-0.103=0
We add all the numbers together, and all the variables
0.7x+0.097=0
We move all terms containing x to the left, all other terms to the right
0.7x=-0.097
x=-0.097/0.7
x=-0.097/0.7
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