Question

Solve this system of equations using any method.

2x – y = 5
4x + y = 7
Responses

(4, –3)


(2, –1)


(2, –4)


(4, –9)

Answer 1

2x-y=5...(1)

4x+y=7...(2)

2x-5=y...(3)

sub (3) into (2)

4x +2x. =7+5

6x/6 = 12/6

x=2

sub x=2 in (2)

4(2) +y

8+y=7

y=7-8

y=-1

therefore (2;-1)