16) -6x + 2y + 2z = -4
-6x + 5y – 6z = 16
6x + 2y - 3z = -8

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled