Question

Реши уравнения.
75+x=90 80-к=42 6*n=54

Answer 1

75 + x = 90 
x = 90 - 75 
x = 15 
-----------------
80 - k = 42 
k = 80 - 42 
k = 38 
-------------------
6*n = 54
n = 54 : 6 
n = 9