Tìm x, y, z thỏa mãn:
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Bài 42: Tìm x, y, z thỏa mãn:
a) \(\frac{x}{8} = \frac{y}{-7} = \frac{z}{12} - 3x + 10y - 2z = 236.\)
b) \(3x = 4y = 5z; x - (y + z) = -21.\)
c) \(\frac{x}{5} = \frac{y}{6} = \frac{z}{7}; x + y - z = 69.\)
d) \(\frac{x - 1}{2} = \frac{y - 2}{3} = \frac{z - 3}{4}; 2x + 3y - z = 50.\)
e) \(\frac{3}{4}x = \frac{4}{5}y = \frac{6}{7}z; x + y + z = -45.\)
f) \(4x = 6y = 3z; x^2 + y^2 + z^2 = 116.\)
Bài 42: Tìm x, y, z thỏa mãn:
a) \(\frac{x}{8} = \frac{y}{-7} = \frac{z}{12} - 3x + 10y - 2z = 236.\)
b) \(3x = 4y = 5z; x - (y + z) = -21.\)
c) \(\frac{x}{5} = \frac{y}{6} = \frac{z}{7}; x + y - z = 69.\)
d) \(\frac{x - 1}{2} = \frac{y - 2}{3} = \frac{z - 3}{4}; 2x + 3y - z = 50.\)
e) \(\frac{3}{4}x = \frac{4}{5}y = \frac{6}{7}z; x + y + z = -45.\)
f) \(4x = 6y = 3z; x^2 + y^2 + z^2 = 116.\)