Question

Z+3,8=8
y-6,5=12
13,5-x=1,8

Answer 1

z+3.8=8
z=8-3.8
z=4.2

y-6.5=12
y=12+6.5
y=18.5

13.5-x=1.8
x=13.5-1.8
x=11.7