exam Maths Puzzle Numerical Ability

HOW DO i SOLVE THIS PROBLEM ? (7XA)x3=7x)2x3)

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exam Other Question

Can you help me solve multi-step equations?I get lost.I get the steps confused.

20. 5/8(p-4)=2 an orchard operator must dilute 11 quarts of 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?