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157=-0.8a+176
We move all terms to the left:
157-(-0.8a+176)=0
We get rid of parentheses
0.8a-176+157=0
We add all the numbers together, and all the variables
0.8a-19=0
We move all terms containing a to the left, all other terms to the right
0.8a=19
a=19/0.8
a=23+0.6/0.8
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