? + ? = 8 + + ? - ? = 6 = = 13 8

Question

? + ? = 8
+ +
? - ? = 6
= =
13 8

Answer 1

Х+у=8
+ +
z-a=6
= =
13 8
составим систему
y+a=8 | +
-x-y=-8
x+z=13
z-a=6
2z=19
z=9.5
a=9.5-6=3.5
x=13-9.5=3.5
y=8-3.5=4.5
3.5+4.5=8
+ +
9.5-3.5=6
= =
13 8