exam Maths Puzzle Numerical Ability

1.8-12y^3/4
2.x-12=-8(x-3)

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exam Other Question

Two planes leave Newark Airport at the same time. The rate of speed of the northbound plane is 100 mi/h faster than that of the southbound plane. St the end of 5 hours, the planes Please Help Slove -15<5x-5<=5