exam Maths Puzzle Numerical Ability

Directions: Solve by the substitution method. Determine weather the equation is independent, Dependant, or inconsistent?

2x-y=4
2x-y=3

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exam Other Question

Can someone help me on this problem?

1, 12, 31, 99 -- Which number is prime?

Thanks,
Sher Solve the following systems by graphing:

2x-3y = 12
-2x+y -8

I finished the problem and then checked my answer in the back of the book. I got the first one correct but cannot figure out the second part.