Question

a)1032 : ( x: 4) = 6

b)123-5.(x+4)=38

c)10+2x=2.(3²-1)

d)2.x-138=2³.3²

e)​[102+(28-2x)]:20-5=1

f)231-(x-6)=1339:13

g)|x-2|=4+-6-(-5)

h)|x-155|=-223+456

 

 

Answer 1

c) 10 + 2x = 2(3² - 1)

10 + 2x = 16

2x = 6

x = 3

d) 2x - 138 = 2³.3²

2x - 138 = 72

2x = 72 + 138

2x = 210

x = 210/2 = 105

 

Answer 2

a) 1032 : (x : 4) = 6

x : 4 = 1032 : 6 = 172

X = 172 x 4 = 688

b) 123 - 5(x + 4) = 38

5(x +  4) = 123 - 38 = 85

x + 4 = 85/5 = 17

x = 17 - 4 = 13

 

Answer 3

f.x=134

g.x=5 ;x=-1 

h. x=388 ; x=-78