1.

If 8x-2y=10 and 3y-9x=12, then what is the value of y -x ?

Answer»

`-8`
2
12
22

Solution :Rearrange the equations to be in the same form, with the y terms before the x terms, and then add:
`-2Y + 8X =10`
`9(+ (3y -9X =12))/(y-x=22)`
The correct ANSWER is (D).


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