1) (34,2-x) : 8,7 = 2,3 2) 12,76 + (48,93-x) : 4,2 = 18,86

Question

1) (34,2-x) : 8,7 = 2,3
2) 12,76 + (48,93-x) : 4,2 = 18,86

Answer 1

34.2-x=2.3*8.7=20.01
x=34.2-20.01=14.19
проверка:
(34.2-14.19)=20.01
20.01:8.7=2.3
2.3=2.3
Ответ:x=14.19
б)(48.93-x):4.2=18.86-12.76
(48.93-x):4.2=6.1
48.93-x=6.1*4.2
48.93-x=25.62
x=48.93-25.62=23.31
проверка:
(48.93-23.31)=25.62
25.62:4.2=6.1
12.76+6.1=18.86
18.86=18.86
Ответ:x=23.31