book Maths Puzzle Numerical Ability

This question is on elimination...
4x-2y=-14
3x-y=-8

My answer was (-2 7/10,-12 4/10) Is this right, because it looks way too big to be the answer
thanks

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book Other Question

Find the dimensions of a rectangle whose area is 180 sq. cm and whose perimeter is 54 cm. you deposit $712 into a saving account for three years. The account pays 6% annual interest,compounded monthly. To calculate the balance in your account after three years, you can