(k + 2958) : 87 = 134
k + 2958 = 134 * 87
k + 2958 = 11658
k= 11658 -2958
k=8700
===================
(8700 +2958) : 87 = 134
11658 :87 = 134
134=134
5у - 72 = 48-3у
5у + 3у = 48 +72
8у =120
у= 120 :8
у= 15
=================
5 * 15 - 72 = 48 - 3*15
75 - 72 = 48- 45
3 = 3