Question 664092
{{{-5+7(-4+4a)=39}}} Start with the given equation.



{{{-5-28+28a=39}}} Distribute.



{{{28a-33=39}}} Combine like terms on the left side.



{{{28a=39+33}}} Add {{{33}}} to both sides.



{{{28a=72}}} Combine like terms on the right side.



{{{a=(72)/(28)}}} Divide both sides by {{{28}}} to isolate {{{a}}}.



{{{a=18/7}}} Reduce.



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Answer:


So the solution is {{{a=18/7}}}