Question

solve simultaneous equations graphically X + Y is equal to zero and 2 x minus Y is equal to 9​

Answer 1

(x+y=0)+(2x-y=9) = (3x=9) = (x=3)

Put x = 3 in eqn 1

x+y=0

3+y=0

y=-3

Solution:

(x,y)=(3,-3)

Answer 2

Answer:

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