Question

calcule os valores x, y e z nos sistemas :

A) x + y – 10 = 0
X – z – 5 = 0
Y – z – 3 = 0

Resp: {( 6, 4, 1)}

Answer 1

y-z-3=0
Y=3+Z

X+3+Z-10=0
X+Z=10-3
X+Z=7
X=7-Z

7-Z-Z-5=0
-2Z=5-7
-2Z=-2
Z=-2/-2
Z=1

X=7-Z
Z=7-1
X=1

Y-Z-3=0
Y-1-3=0
Y-4=0
Y=4