Question

Me ajudem a resolver esse desafio:

resolva esses sistema de equaçoes:

2x=z
x+y=6
y+z=7

Answer 1

2X = Z --> X = Z/2

X+Y = 6 --> (Z/2)+Y = 6 --> Z+2Y = 12 --> 2Y = 12-Z --> Y = 12/2-Z/2 --> Y = 6-Z/2

Y+Z = 7 --> (6-Z/2)+2X = 7 --> (6-2X/2)+2X = 7 --> 6-X+2X = 7 --> 6-3X = 7 --> -3X = 7-6 --> -3X = 1      (-1) --> 3X = -1 --> X = -1/3

2X = Z --> 2(-1/3) = Z --> -2/3 = Z --> Z = -2/3

X+Y = 6 --> (-1/3)+Y = 6 --> Y = 6-(-1/3) --> Y = 6+1/3 --> Y = 18/3+1/3 --> Y = 19/3