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x-11.37(7-2.1x)=1.9x+7
We move all terms to the left:
x-11.37(7-2.1x)-(1.9x+7)=0
We add all the numbers together, and all the variables
x-11.37(-2.1x+7)-(1.9x+7)=0
We multiply parentheses
x+22.74x-(1.9x+7)-79.59=0
We get rid of parentheses
x+22.74x-1.9x-7-79.59=0
We add all the numbers together, and all the variables
21.84x-86.59=0
We move all terms containing x to the left, all other terms to the right
21.84x=86.59
x=86.59/21.84
x=3+1/1.0365448505
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