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0.9x+0.3(240-x)=0.5(240)
We move all terms to the left:
0.9x+0.3(240-x)-(0.5(240))=0
We add all the numbers together, and all the variables
0.9x+0.3(-1x+240)-(0.524)=0
We add all the numbers together, and all the variables
0.9x+0.3(-1x+240)-0.524=0
We multiply parentheses
0.9x-0.3x+72-0.524=0
We add all the numbers together, and all the variables
0.6x+71.476=0
We move all terms containing x to the left, all other terms to the right
0.6x=-71.476
x=-71.476/0.6
x=-119+0.076/0.6
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