4 years ago

Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4

1 answer:

5 0

1. x=−y+8−z 2.x=−7−4y−5z (everything over 4) 3.x=2−z 1.y=-x+8-z 1.z=-x+4-y 2.y=7+4x-5x (everything over 4) 2.z=7+4x-4y (everything over 5) 3.z=2-x

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S_A_V [24]

Answer:

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Step-by-step explanation:

Here, we want to get the number of solutions

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3x + 2x = -3-4

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