3/7 X + 25 = 1/2X
1/2X - 3/7X = 25
1\14X = 25
X = 25\1\14
X = 350
3\7*x шариков+15шариков=1\2* x 1\2*x-3\7*x=15 7\14*x-6\14*x=15 1\14*x=15 x=15*14 x=120 шариков
3/7 X + 25 = 1/2X
1/2X - 3/7X = 25
1\14X = 25
X = 25\1\14
X = 350
3\7*x шариков+15шариков=1\2* x 1\2*x-3\7*x=15 7\14*x-6\14*x=15 1\14*x=15 x=15*14 x=120 шариков