Question

What is the subtraction of this?
-x+2y=4
x-y=4​

Answer 1

Answer:

-x+2y=4_____( 1 )

x-y=4_____( 2 )

Multiplying by 2 in equation 2

2x-2y=8______( 3 )

adding equation ( 1 ) and ( 3 )

-x+2y=4______( 1 )

+ 2x-2y=8______( 3 )

+ + +

___________

3x = 12

x= 12/3

Therefore x=4

X = 4 Putting the equation in ( 1 )

-x+2y=4______( 1 )

-4+2y=4

2y=4+4

2y=8

y=8/2

therefore y=4

so therefore ( x,y )=(4,4)

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