0.8(1970-a)+0.5a=12,220

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Solution for 0.8(1970-a)+0.5a=12,220 equation:


0.8(1970-a) + 0.5a=12,220

We simplify the equation to the form, which is simple to understand 
0.8(1970-a) + 0.5a=12,220

Reorder the terms in parentheses
+(+1576-0.8a) + 0.5a=12,220

Remove unnecessary parentheses
+1576-0.8a + 0.5a=+12,220

We move all terms containing a to the left and all other terms to the right. 
-0.8a + 0.5a=+12.22-1576

We simplify left and right side of the equation. 
-0.3a=-1563.78

We divide both sides of the equation by -0.3 to get a. 
a=5212.6

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