Пошаговое объяснение:
2)
(y-25)+18=40
y - 25 + 18 = 40
y - 7 = 40
y = 40 + 7
y = 47
4)
60-(y+34)=5
60 - y - 34 = 5
26 - y = 5
y = 26 - 5
y = 21
6)
20+5x=100
5x = 100 - 20
5x = 80
x = 80 : 5
x = 16
8)
10x-44=56
10x = 56 + 44
10x = 100
x = 100 : 10
x = 10
10)
121:(x-45)=11
x - 45 = 121 : 11
x - 45 = 11
x = 11 + 45
x = 56
12)
(x-12):10 = 4
x - 12 = 4 * 10
x - 12 = 40
x = 40 + 12
x = 52
14)
x:12+48=91
x : 12 = 91 - 48
x : 12 = 43
x = 43 * 12
x = 516
16)
36y-16y+5y=0
25y = 0
y = 0
18)
20y-14y+7y-13=13
13y - 13 = 13
13y = 13+13
13y = 26
y = 26 : 13
y = 2
Пошаговое объяснение:
2)
(y-25)+18=40
y - 25 + 18 = 40
y - 7 = 40
y = 40 + 7
y = 47
4)
60-(y+34)=5
60 - y - 34 = 5
26 - y = 5
y = 26 - 5
y = 21
6)
20+5x=100
5x = 100 - 20
5x = 80
x = 80 : 5
x = 16
8)
10x-44=56
10x = 56 + 44
10x = 100
x = 100 : 10
x = 10
10)
121:(x-45)=11
x - 45 = 121 : 11
x - 45 = 11
x = 11 + 45
x = 56
12)
(x-12):10 = 4
x - 12 = 4 * 10
x - 12 = 40
x = 40 + 12
x = 52
14)
x:12+48=91
x : 12 = 91 - 48
x : 12 = 43
x = 43 * 12
x = 516
16)
36y-16y+5y=0
25y = 0
y = 0
18)
20y-14y+7y-13=13
13y - 13 = 13
13y = 13+13
13y = 26
y = 26 : 13
y = 2