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25+a=13*13
We simplify the equation to the form, which is simple to understand
25+a=13*13
We move all terms containing a to the left and all other terms to the right.
+1a=+169-25
We simplify left and right side of the equation.
+1a=+144
We divide both sides of the equation by 1 to get a.
a=144
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