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OpenStudy (anonymous):
is (-2,8) a solution of 3x-4y=18??
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OpenStudy (amistre64):
plug it in to test the case
OpenStudy (anonymous):
Plug in your point for x and y and see if it's equals
OpenStudy (amistre64):
(x=-2,y=8) 3x-4y=18 -2 8 ----------- -6-32=18
OpenStudy (anonymous):
substitute: 3(-2) - 4(8) = -6 - 32 = -38 which does not equal 18
OpenStudy (anonymous):
thanks
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