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7a+4-13=46
We simplify the equation to the form, which is simple to understand
7a+4-13=46
We move all terms containing a to the left and all other terms to the right.
+7a=+46-4+13
We simplify left and right side of the equation.
+7a=+55
We divide both sides of the equation by 7 to get a.
a=7.8571428571429
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