Question

a ) 170 - ( 4 + 5 * x ) = 101

b ) 21 * ( 32 - x ) = 21

Answer 1

a, 170 - ( 4+5 *x ) = 101 

    4+ 5*x = 170 - 101 

   4+5 *x = 69 

5*x = 69 - 4

5*x= 65 

x= 65: 5 

x=13 

b, 21 * ( 32 - x ) = 21

 32 -x= 21 : 21

32 - x = 1 

x = 32 -1

x= 31

Answer 2

Bài làm :

\(a,170-\left(4+5.x\right)=101\)

\(4+5.x=170-101\)

\(4+5.x=69\)

\(5x=65\)

\(x=13\)

\(b,21.\left(32-x\right)=21\)

\(32-x=1\)

\(x=31\)

Học tốt nhé

Answer 3

170-(4+5×x)=101

(4+5×x)=170-101

(4+5×x)=69

5×x=69-4

5×x=65

x=65:5

x=13

vậy x=13

21×(32-x)=21

(32-x)=21:21

(32-x)=1

x=32-1

x=31

vậy x=31

Answer 4

                                                           Bài giải

a, \(170-\left(4+5x\right)=101\)

\(4+5x=170-101\)

\(4+5x=69\)

\(5x=65\)

\(x=13\)

b, \(21\left(32-x\right)=21\)

\(32-x=1\)

\(x=31\)

Answer 5

        Bài làm :                           

 \(a\text{)}170-\left(4+5x\right)=101\)

\(\Leftrightarrow4+5x=170-101\)

\(\Leftrightarrow4+5x=69\)

\(\Leftrightarrow5x=65\)

\(\Leftrightarrow x=13\)

 \(b\text{)}21\left(32-x\right)=21\)

\(\Leftrightarrow32-x=1\)

\(\Leftrightarrow x=31\)

Answer 6

a 170-(4+5^* x) 

Answer 7

x=31 nha

hok tot

mong bn k mik

Answer 8

a) 170 - (4 + 5x) = 101

4 + 5x = 170 - 101

4 + 5x = 69

5x = 69 - 4

5x = 65

x = 65 : 5

x = 13

Vậy x = 13

b) 21 x (32 - x) = 21

32 - x = 21 : 21

32 - x = 1

x = 32 - 1

x = 31

Vậy x =31