Question

Решите уравнения.
1) 48 : z + 879 = 887
2) 974 - b : 7 = 869
3) у : 2 - 275 = 145

Answer 1

1)
48 : z + 879 = 887
48:z=887-879
48:z=8
z=6

2)
974 - b : 7 = 869
974-869=b:7
105=b:7
b=735

 3)
 у : 2 - 275 = 145
y:2=145+275
y:2=420
y=840