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Given the equation system 5x + 8y + Z = 0 - 5x + 6y + Z = 0, find X: Y: z =? Given the equation system 5x + 8y + Z = 0 - 5x + 6y + Z = 0, find X: Y: z =?
By adding the formula of 5x + 8y + Z = 0 - 5x + 6y + Z = 0, we can get the formula of 14y + 2Z = 0, 7Y + Z = 0, z = - 7Y. By subtracting the two formulas, we can get the formula of 10x + 2Y = 0, 5x + y = 0, x = - Y / 5 X: Y: z = - Y / 5: Y: - 7Y = - 1 / 5:1: - 7 = - 1:5: - 35?
If y = 5x, y is inversely proportional to X______ (judge right or wrong)
Because y = 5x, so YX = 5 (certain), the ratio of X and Y is certain, X and y are in positive proportion, so the original question is wrong
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