exam Maths Puzzle Numerical Ability

Could someone help me on this problem?

I need to evaluate the following problem.

4- (-3) + 1/1-1 divided by (-2)

Thanks,
Lyn

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exam Other Question

If the two given equations are being solved so that one unknown is eliminated by the method of comparison, which step is esential in the following problem.
3x+2y=7
6x-5y=8 solve the following of linear equation by elimination, i.e. solve for x and y, and explain the meaning of the answer:
3x+4y=-3
-6x-8y=6