exam Maths Puzzle Numerical Ability

Please help.

Solve the following systems by graphing.

2x - y = 4
2x - y = 6

Thanks
JMS

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exam Other Question

solve using the square root property:
2x^2-5=93 I have to graph:
4x+6y=1000

3x-5y=15

y is less then or equal to 3/4x-5

15x+2y>60

-40x+30y<1200