h)
5 x - 21 : 7 = 4 + 13
5 x - 3 = 17
5 x = 17 + 3
x = 20 : 5
x = 5
i)
13 - 14 : x = 18 - 7
14 : x = 13 - 11
14 : x = 2
x = 14 : 2
x = 7
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a)
x + 5 · ( 33 + 128 ) = 895
x + 5 · 161 = 895
x + 805 = 895
x = 895 - 805
x = 90
b)
x - 53 · ( 49 - 3 · 12) = 996
x - 53 · ( 49 - 36 ) = 996
x - 53 · 13 = 996
x = 996 + 689
x = 1 685
c)
53 + 2 x = x + 111
2 x - x = 111 - 53
x = 58
d)
23 + 5 x = 2 x + 74
5 x - 2 x = 74 - 23
3 x = 51
x = 51 : 3
x = 17
e)
32 + 6 x = 11 x - 113
6 x - 11 x = - 113 - 32
- 5 x = - 145
x = ( - 145 ) : ( - 5)
x = 29
f)
8 + 13 x = 2 x + 41
13 x - 2 x = 41 - 8
11 x = 33
x = 33 : 11
x = 3