book Maths Puzzle Numerical Ability

solve:

_3y+2_ = 7
4

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book Other Question

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.45 What is the fractional equivalent? (45/100) but what does the line above the number mean? Write this phrase in algebraic terms: Seven times the sum of a number and a second
number is the product of five and the second number.
A) 7x + y = 5y B) 7(x + y) = 5 + y C) 7x + y = 5 + y D) 7(x + y) = 5y