exam Maths Puzzle Numerical Ability

Please help me solve the problem below by addition, substituting and graphing...

4x - 6y = 12
2x + 2y = 6

Thank you for your help

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exam Other Question

One number is 6 more than another. If the sum of the smaller number and 3 times the larger number is 34, find the two numbers. No book. Sorry! Thankyou!!! Find the variation constant and an equation of variation where y varies directly as x and y=8 when x=4.
The variation constant is k=_.
The equation of variation is y=_