Question

if 4x+y=7 and x+4y=-2 then the value of x-y=

Answer 1

Step-by-step explanation:

4x+y=7 ( 1)

x+4y=-2 (2)

adding equations (1) and (2)

4x+y=7

+ x+4y=-2

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5x+5y=5

5(x+y)=5

x+y=1