Question

x - y + 2 = 0
7x+ 9y - 130
pls give me the ans fast.
simultaneous equation ​

Answer 1

Answer:

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Answer 2

Answer:

x= -74

y= -72

Step-by-step explanation:

x-y+2=0

=x-y= -2

multiplying the whole equation by 7

7(x-y= -2)

=7x-7y= -14 ...............(i)

7x-9y-130=0

7x-9y=130 .................(ii)

subtracting (i) from (ii)

7x-9y= 130

7x-7y=-14

- + +

___________

-2y= 130+14

_________

-2y=144

y=144/-2

y= -72

x-y=-2

x=-2+y

x= -2-72

x=-74

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