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krissywatts
solve system of equation: x+y=-1 y-z=4 2x+y+5z=-38
You can use y-4=z instead of z in the third equation... Do you know rest of the solution...?
plug it into your calculator!
i got 13,-14, and 10 or -10 and something still not adding up right
What's the problem...?
y - z = 4 ---> z = y - 4 x + y = -1 ---> x = -y-1 then plug these into third one... 2x + y + 5z = -38 ----> 2(-y-1) + y + 5(y-4) = -38 .... -2y-2+y+5y-20=-38 ----> 4y=16 y=... then plug y in other equations to find x and z...