Which of the ordered pairs (3, 1), (0, –4), (–4, 0), (–3, –7) are solutions for the equation x – y = 4?

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Answer 1 · 2018-04-13T13:51:15

$(0, - 4)$ $(0,-4)$ and $(- 3, - 7)$ $(-3,-7)$

You just have to sub each point into the equation $x - y = 4$ $x-y=4$

ie Sub $(3, 1)$ $(3,1)$ into the equation

LHS: $3 - 1$ $3-1$ = $2$ $2$
RHS: $4$ $4$ which doesn't equal to LHS

Therefore, it isn't a solution of the equation

Sub $(0, - 4)$ $(0,-4)$

LHS: $0 - (- 4)$ $0-(-4)$ = $0 + 4$ $0+4$ = $4$ $4$
RHS: $4$ $4$ which equals to LHS

Therefore, it is a solution of the equation