Question

[Hoàng Nguyệt Ánh]

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help me!!!

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Answer 1

[Darlingg🥝]

bài 6:

a) (x-5)(x-7)=0

=> x-5=0 hoặc x-7=0

=> *x-5=0=>x=0+5=5

     *x-7=0=>x=0+7=7

vậy x=5 hoặc x=7

b)541+(218-x)=735

=>218-x=735-541

=>218-x=194

=>x=218-194

=>x=24

vậy x=24

c)96-3(x+1)=42

=>-3(x+1)=42-96

=>-3(x+1)=-54

=>x+1=-54:-3

=>x+1=18

=>x=18-1

=>x=17

vậy x=17

d) (x-47)-115=0

=>(x-47)=0+115

=>x-47=115

=>x=115+47

=>x=162

vậy x=162

e)(x-36):18=12

=>x-36=12.18

=>x-36=216

=>x=216-36

=>x=180

vậy x=180

bài 7: 

a) x+37=50

=>x=50-37

=>x=13

vậy x=13

b)2x-3=11

=>2x=11+3

=>2x=14

=>x=14:2

=>x=7

vậy x=7

c) (2+x):5=6

=> 2+x=6.5

=>2+x=30

=>x=30-2

=>x=28

vậy x=28

d)2+x:5=6

=>x:5=6-2

=>x:5=4

=>x=4/5

vậy x=4/5