Question

find the value of x- y if 4x +3y =18 and 3x + 4y = 15
it's urgent please ​

Answer 1

Answer:

1

Step-by-step explanation:

4x+3y =18 ---A

3x+4y =15 ---B

A×3- B×4

12x+9y = 54

12x+16y=60

- - -

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7y = 14

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y=2, substitute inA

4x+6 =18

x=3

x-y =3-2=1