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10000=100+2a*150
We move all terms to the left:
10000-(100+2a*150)=0
We add all the numbers together, and all the variables
-(2a*150+100)+10000=0
We get rid of parentheses
-2a*150-100+10000=0
We add all the numbers together, and all the variables
-2a*150+9900=0
Wy multiply elements
-300a+9900=0
We move all terms containing a to the left, all other terms to the right
-300a=-9900
a=-9900/-300
a=+33
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