3,8:(4с+3)=2:2 цел.2/19

Question

3,8:(4с+3)=2:2 цел.2/19

Answer 1

1) 2:2 2\19=2:40\19=2 *19\40=19\20
3,8:(4с+3)=19\20
 4с+3=3,8:19\20           38\10:19\20=38\10 * 20\19= 4
 4с+3=4
4с=4-3
4с=1
с=1\4