exam Maths Puzzle Numerical Ability

5-3 on the outside of an absolute value bars with this euation inside the bars
-8-6. Looks like this 5-3|-8-6| I tried to do the inside firstand got -14 but when I got the outsid

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exam Other Question

Two drums contain 125 L and 175 L of oil respectively. Find the largest capacity of a container which can be used to measure the oil of both drums an exact number of times. how do i find sloope of an equation that looks like this
X-2/3y=1/4

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2X-5Y=0