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-2.1u-7(5.5u-3.39)=-4.9u+6.97+6.05
We move all terms to the left:
-2.1u-7(5.5u-3.39)-(-4.9u+6.97+6.05)=0
We add all the numbers together, and all the variables
-2.1u-7(5.5u-3.39)-(-4.9u+13.02)=0
We multiply parentheses
-2.1u-35u-(-4.9u+13.02)+23.73=0
We get rid of parentheses
-2.1u-35u+4.9u-13.02+23.73=0
We add all the numbers together, and all the variables
-32.2u+10.71=0
We move all terms containing u to the left, all other terms to the right
-32.2u=-10.71
u=-10.71/-32.2
u=3.9520295202952/11.881918819188
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