exam Maths Puzzle Numerical Ability

19) Solve

4x-7 <-5 or 4x-7 > 2
8 8

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exam Other Question

I have been stuck on solving this equation

8x-11x+13x=40-16x+6x The difference of two numbers is 1. 1/7 the larger number less 1/9 the smaller number is 1. Find the numbers.