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7(8.1/9)=a
We move all terms to the left:
7(8.1/9)-(a)=0
We add all the numbers together, and all the variables
-a+7(+8.1/9)=0
We add all the numbers together, and all the variables
-1a+7(+8.1/9)=0
We multiply parentheses
-1a+8.1/9*7=0
We multiply all the terms by the denominator
-1a*9*7+8.1=0
Wy multiply elements
-63a*7+8.1=0
Wy multiply elements
-441a+8.1=0
We move all terms containing a to the left, all other terms to the right
-441a=-8.1
a=-8.1/-441
a=7.3636363636364/400.90909090909
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