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
Step-by-step explanation:
