exam Maths Puzzle Numerical Ability

can you please help me with this, i am not good at this at all. i have not been getting good grades in my class.

Cliff Swatner is single, 33, and owns a condominium in New Yor

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exam Other Question

How much 40% acid solution should be mixed with 2 gallons of 60% acid solution in order to get 50% acid solution? Set up an equation to solve. hi, i need exactly step by step solution using elimination and substitution method and check.thank u

3y=7-2x
5y=7y-3