SOLUTION: Hi. I'm checking to see if I solved this problem correctly. Solve each system by substitution, if possible {2x-y=-21 4x+5y=7 thanks H.C.

SOLUTION: Hi. I'm checking to see if I solved this problem correctly. Solve each system by substitution, if possible {2x-y=-21 4x+5y=7 thanks H.C.

Algebra.Com

Question 181413: Hi.
I'm checking to see if I solved this problem correctly.
Solve each system by substitution, if possible
{2x-y=-21
4x+5y=7
thanks
H.C.
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Add in your solution next time please

Substitute that into

Check your answer
Does 4*(-7) + 5*(7) = 7 ???

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