Answer:
(-2,3)
Explanation:
y=3x+9.......eqn 1. y=2x+7........eqn 2. solve the two equations simultaneously. subtract eqn 2 from eqn 1. 0=x+2. x= -2. substitute x= -2 into eqn 2. y=2(-2) +7. y=3
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