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142+146+u+26+146+u+39+2u-35+u+38+128=1080
We move all terms to the left:
142+146+u+26+146+u+39+2u-35+u+38+128-(1080)=0
We add all the numbers together, and all the variables
5u-450=0
We move all terms containing u to the left, all other terms to the right
5u=450
u=450/5
u=90
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