a: =>x+60=160
hay x=100
f: =>3(x-5)=12
=>x-5=4
hay x=9
g: =>8x-76=4
=>8x=80
hay x=10
h: =>7x-42=4x+9
=>3x=51
hay x=17
a) (x + 60) - 160 = 0
=> x + 60 = 160
hay x = 100
f) 26 - 3 . (x - 5) = 14
=> x - 5 = 4
=> x - 5 = 4
hay x = 9
g) 144 : (8 . x - 76) = 36
=> 8x - 76 = 4
=> 8x = 80
hay x = 10
h) 7 . (x - 6) = 4x + 9
=> 7x - 42 = 4x + 9
=> 3x = 51
hay x = 17
a) (x + 60) - 160 = 0
(x + 60) = 0 + 160
(x + 60) = 160
x = 160 - 60
x = 100
b) (156 - 9x + 61) = 82
156 - 9x = 82 - 61
156 - 9x = 21
9x = 156 - 21
9x = 135
x = 135 : 9
x = 15
c) 12 : (3x - 7) + 34 = 40
12 : (3x - 7) = 40 - 34
12 : (3x - 7) = 6
(3x - 7) = 12 : 6
(3x - 7) = 2
3x = 2 + 7
3x = 9
x = 9 : 3
x = 3
d) 101 + (105 : x - 12) . 7 = 122
(105 : x - 12) . 7 = 122 - 101
(105 : x - 12) . 7 = 21
(105 : x - 12) = 21 : 7
(105 : x - 12) = 3
105 : x = 3 + 12
105 : x = 15
x = 105 : 15
x = 7
e) 12 . [43 - (56 - x)] = 384
[43 - (56 - x)] = 384 : 12
[43 - (56 - x)] = 32
(56 - x) = 43 - 32
(56 - x) = 11
x = 56 - 11
x = 45
f) 26 - 3 . (x - 5) = 14
3 . (x - 5) = 26 - 14
3 . (x - 5) = 12
(x - 5) = 12 : 3
(x - 5) = 4
x = 4 + 5
x = 9
g) 144 : (8 . x - 76) = 36
(8 . x - 76) = 144 : 36
(8 . x - 76) = 4
8 . x = 4 + 76
8 . x = 80
x = 80 : 8
x = 10
h) 7 . (x - 6) = 4x + 9
7x - 42 = 4x + 9
7x - 42 - 4x = 9
3x - 42 = 9
3x = 9 + 42
3x = 51
x = 51 : 3
x = 17.
a: =>x+60=160
x=100
f: =>3(x-5)=12
=>x-5=4
x=9
g: =>8x-76=4
=>8x=80
x=10
h: =>7x-42=4x+9
=>3x=51
x=17
