Question

At an archery range each shot cost 20c.if you hit the target you receive 30c.Emma has 20 shots and make aloss of 70c.how many hits did she get

Answer 1

Answer:

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Answer 2

Answer:

11

=x+y=20//

=x=20-y

=-20x-10y=-70

=-20(20-y)-10y=-70

=-400-20y-10y=-70

=-400-30y=-70

=30y=-70+400

30y=330

y=330÷30

y=11