Question

mn giúp với mai em phải nộp rồi

Answer 1

a)

x-3=21

x=21+3

x=24

b)

15-x.3=6

x.3=15-6

x.3=9

x=9:3

x=3

c)

x+21:7=6

x+3=6

x=6-3

x=3

d)

44+x:3=50

x:3=50-44

x:3=6

x=6.3

x=18

e)

(x-42)-110=0

x-42=0+110

x-42=110

x=110+42

x=152

f)

2436:x=12

x=2436:12

x=203

g)

74(x-3)=0

x-3=0:74

x-3=0

x=0+3

x=3

h)

x-36:18=2

x-2=2

x=2+2

x=4

i)

71-(33+x)=26

33+x=71-26

33+x=45

x=45-33

x=12

k)

97-(64-x)=44

64-x=97-44

64-x=53

x=64-53

x=11

m)

x-36:18=12

x-2=12

x=12+2

x=14

n)

3636:(12x-91)=36

12x-91=3636:36

12x-91=101

12x=101+91

12x=192

x=192:12

x=16