Question

Me ajudem a resolver esse problema.
X+Y-Z+2t=12
Y -Z-3t+=1
Z-4t=2
t=3

Answer 1

t = 3

z - 4t=2
z-4×3=2
z-12=2
z=2+12
z=14

y-z-3t=1
y-14-3×3=1
y-14-9=1
y-23=1
y=1+23
y=24

x+y-z+2t=12
x+24-14+2×3=12
x+10+6=12
x+16=12
x=12-16
x=-4