Question

Solve for the system using substituion. 7x−8y=112y=−2x+9

Answer 1

(8, -7) is your answer

Answer 2

Answer:You substitute the y-value of the second equation into the first:

→7x−8⋅(−2x+9)=112

→7x+16x−72=112

→23x=184→x=18423=8

Now put back the value of x in the second equation:

y=−2⋅8+9=−7

So x=8andy=−7

Check your answer with the first equation:

7⋅8−8⋅(−7)=56−(−56)=112 check

Explanation: