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0.5x+0.05(4-7x)=0.13(5)
We move all terms to the left:
0.5x+0.05(4-7x)-(0.13(5))=0
We add all the numbers together, and all the variables
0.5x+0.05(-7x+4)-(0.135)=0
We add all the numbers together, and all the variables
0.5x+0.05(-7x+4)-0.135=0
We multiply parentheses
0.5x-0.35x+0.2-0.135=0
We add all the numbers together, and all the variables
0.15x+0.065=0
We move all terms containing x to the left, all other terms to the right
0.15x=-0.065
x=-0.065/0.15
x=-0.065/0.15
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