Question

a) 2x + 34 = 72

b) (4+x) . 2 phần 3 =9 

c) (2x + 1 ) 3 =36 

d ) (x + 5 ) : 4 =12

e ) 1 phần 2 x -- 4 = 15

Answer 1

giúp mk đi mà

Answer 2

a) 2x + 34 = 72

2x=38

x=19

b) (4+x) . 2 phần 3 =9

4+x=\(\frac{27}{2}\) 

x=\(\frac{19}{2}\)

c) (2x + 1 ) 3 =36 

2x+1=12

2x=11

x=\(\frac{11}{2}\)

d ) (x + 5 ) : 4 =12

x+5=48

x=43

e ) 1 phần 2 x -- 4 = 15

\(\frac{1}{2}x\)=19

x=38

Answer 3

a,2x+34=72

2x=38

x=38:2

x=19

Vậy x=19

b,\(\left(4+x\right)\cdot\frac{2}{3}=9\\ 4+x=\frac{27}{2}\\ x=\frac{27}{2}-4\\ x=\frac{19}{2}\)

Vậy x=\(\frac{19}{2}\)

c,(2x+1)3=36

2x+1=12

2x=11

x=\(\frac{11}{2}\)

Vậy x=\(\frac{11}{2}\)

d,(x+5):4=12

x+5=48

x=43

Vậy x=43

e,\(\frac{1}{2}x+4=15\)

\(\frac{1}{2}x=11\)

\(x=22\)

Vậy x=22