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1=0.3a-0.7a-35
We move all terms to the left:
1-(0.3a-0.7a-35)=0
We add all the numbers together, and all the variables
-(-0.4a-35)+1=0
We get rid of parentheses
0.4a+35+1=0
We add all the numbers together, and all the variables
0.4a+36=0
We move all terms containing a to the left, all other terms to the right
0.4a=-36
a=-36/0.4
a=-90
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