Mathematics, 17.10.2020 14:01 joshuahagerman1404

X — бу + 2x = 5 2x – 3y+z = 4 3х +4y - z = -2 help on how to do it , its about substitution.

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X — бу + 2x = 5 2x – 3y+z = 4 3х +4y - z = -2 help on how to do it , its about substitution....