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0.04x+0.05(3000-x)=136
We move all terms to the left:
0.04x+0.05(3000-x)-(136)=0
We add all the numbers together, and all the variables
0.04x+0.05(-1x+3000)-136=0
We multiply parentheses
0.04x-0.05x+150-136=0
We add all the numbers together, and all the variables
-0.01x+14=0
We move all terms containing x to the left, all other terms to the right
-0.01x=-14
x=-14/-0.01
x=+1400
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