Question 1073394
{{{(f+g)(x)=2x+5+ax-7}}}


{{{(f+g)(x)=(2+a)*x-2}}}


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{{{(f+g)(2)=(2+a)*(2)-2=10}}}

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{{{4a+2a-2=10}}}

{{{2a+2=10}}}

{{{a+1=5}}}

{{{highlight(a=4)}}}

(fixed)






------this part was wrong-------------------

{{{4+4a-2=10}}}

{{{4a=10-4+2}}}

{{{4a=8}}}

{{{highlight(cross(a=2))}}}