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)# and #(-3,-7)#

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

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

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

Therefore, it isn't a solution of the equation

Sub #(0,-4)#

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

Therefore, it is a solution of the equation