book Maths Puzzle Numerical Ability

3/4B-1/2 =5/8B

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book Other Question

translate to a system of equations and solve.

the sum of two numbers is 30. their difference is 40. find the numbers. The first side of a triangle is 8m shorter than the second side. The third side is 4times as long as the first side. The perimeter is 26m. Find the length of each side.