Question 539558
{{{5a+2a-2=40}}} Start with the given equation.



{{{7a-2=40}}} Combine like terms on the left side.



{{{7a=40+2}}} Add {{{2}}} to both sides.



{{{7a=42}}} Combine like terms on the right side.



{{{a=(42)/(7)}}} Divide both sides by {{{7}}} to isolate {{{a}}}.



{{{a=6}}} Reduce.



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Answer:


So the solution is {{{a=6}}} 



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