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3.4(2-a)=-2.1(a+4)
We simplify the equation to the form, which is simple to understand
3.4(2-a)=-2.1(a+4)
Reorder the terms in parentheses
+(+6.8-3.4a)=-2.1*(a+4)
Remove unnecessary parentheses
+6.8-3.4a=-2.1+*(+a+4+)
Reorder the terms in parentheses
+6.8-3.4a=+(-2.1a-8.4)
Remove unnecessary parentheses
+6.8-3.4a=-2.1a-8.4
We move all terms containing a to the left and all other terms to the right.
-3.4a+2.1a=-8.4-6.8
We simplify left and right side of the equation.
-1.3a=-15.2
We divide both sides of the equation by -1.3 to get a.
a=11.6923076923
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