exam Maths Puzzle Numerical Ability

Please help me with these equations: X+2y=5, 3x-y=1, 3x+y+4, x+3y=-4 thank you so much..

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The problem I have is what to do with an absolute value cubed and in brackets. Example:

-6(24-9 X /2-10/^3) the 2-10^3 should be in the absolute bracket lines but my computer Design a problem so that you can write an equation for the straight line that goes through the data you provide. Or, you may want to research (almanac, newspaper, magazine, Interne