Question

X+y=50
Y+Y+Y=120
X+Z=25
Z=?

Answer 1

Answer:

Let's name the given equations

x+y = 50 (1)

y+y+y = 120 (2)

x+z= 25 (3)

On solving (3), we get

y+y+y = 120

--> 3y = 120

--> y = 120/3

--> y = 40

Putting y=40 in (1)

x+y = 50

--> x+ 40 = 50

--> x = 50-40

--> x = 10

Putting x = 10 in (3)

x+z= 25

--> 10 + z = 25

--> z= 25- 10

--> z = 15

Thus, Z = 15

Hope it helps!

:)