exam Maths Puzzle Numerical Ability

Can someone help me here?

I need to solve the system by addition or substitution

3x - 4y = 8
6x - 2y = 10

Thanks,
Jamie

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exam Other Question

solve by using quadratic formula
t^2 + 2t + 2 = 0 Can someone help me plot the point with coordinates (-4,3)
and show me what the graph looks like?
I sure would appreciate it.
Thanks,
Lisa