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49=-1(a-4)-8(-4a+6)
We simplify the equation to the form, which is simple to understand
49=-1(a-4)-8(-4a+6)
Reorder the terms in parentheses
49=+(-1a+4)-8*(-4a+6)
Remove unnecessary parentheses
+49=-1a+4-8+*(-4a+6+)
Reorder the terms in parentheses
49=-1a+4+(+32a-48)
Remove unnecessary parentheses
+49=-1a+4+32a-48
We move all terms containing a to the left and all other terms to the right.
+1a-32a=+4-48-49
We simplify left and right side of the equation.
-31a=-93
We divide both sides of the equation by -31 to get a.
a=3
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