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5(a+2)-2(a+5)=49-4a
We simplify the equation to the form, which is simple to understand
5(a+2)-2(a+5)=49-4a
Reorder the terms in parentheses
+(+5a+10)-2*(a+5)=49-4a
Remove unnecessary parentheses
+5a+10-2+*(+a+5+)=+49-4a
Reorder the terms in parentheses
+5a+10+(-2a-10)=49-4a
Remove unnecessary parentheses
+5a+10-2a-10=+49-4a
We move all terms containing a to the left and all other terms to the right.
+5a-2a+4a=+49-10+10
We simplify left and right side of the equation.
+7a=+49
We divide both sides of the equation by 7 to get a.
a=7
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