book Maths Puzzle Numerical Ability

-6y = 960

18w = -234

375 = 14x + (=17)

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book Other Question

i forgot what the algebraic method was...here is my equation to solve...

x-y=3
-2x+2y=-6

thank you.... (1) Find the x- intercepts of the graph of f(x) =2x^2-4x-4