Mathematics
JanellHemry431
21

how do I solve this system using substitution: y = x - 7 ; 2x + y = 8

+2
(2) Answers
nikolak

y = x - 7 2x + y = 8 2x + (x - 7) = 8   2x + x - 7 = 8         3x - 7 = 8             + 7 + 7              3x = 15               3      3                x = 5 y = x - 7 y = 5 - 7 y = -2 (x, y) = (5, -2)

Junior79

y=x-7 2x+y=8 2x+x-7=8 3x=15 x=15/3 x=5 y=x-7 y=5-7 y=-2 x=5 y=-2

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