exam Maths Puzzle Numerical Ability

The perimeter of a triangle is 153 inches. The length of the longest side is 5/4 the length of the shortest side and the length of the other side is 10 inches more than the length of the shortest side. Find the length of each side.

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exam Other Question

Ed has 100 dollars more than Robert. After Ed spends 20 dollars on groceries, Ed has 5 times as much as money as Robert. How much money does he have? 132.48/x=147.12

Can you give me step by step to solve this, i did it with a calculator and got the answer, just forgot how to actually solve.