4x-2y=-4 7x-2y=-13

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1 Answer

a). 4x - 2y = -4

b). 7x - 2y = -13

subtract b). from a).

  4x - 2y = -4

- 7x + 2y = 13

-------------------

-3x = 9

x = -3

sub back into a).

4*(-4) - 2y = -4

-16 - 2y = -4

-2y = 12

y = -6 

by Level 10 User (55.7k points)

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