book Maths Puzzle Numerical Ability

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

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book Other Question

wat is the solving equation for 104=1/2[(360-x)-x] and thanks cause me and my dad cant figuere it out Addition seems simple enough to me, but the minus/negative numbers confuse me on factoring.

x2 - 6x - 3 = 0