Question

1)   300-(2x+4).3 bằng150

2)    2^x.x-2³.3³ bằng0

3)    X:5-27:5 bằng 18

4)    (x+1)².2 bằng 32

5)    2^x+1 bằng 64

6)    3.(x+1)-2³.2 bằng11

7)    180-2.(x+5)² bằng 130

8)    X:{500-[(5².12-5².2)2.5².3

9)    2.(x+1)-2³.2 bằng 2⁵:2⁴

10)                       2.x+3.x+4.x bằng 180

Answer 1

6)\(3.\left(x+1\right)-2^3.2=11\)

\(3\left(x+1\right)-2^4=11\)

\(3.\left(x+1\right)=11+16\)

3.(x+1)=27

x+1=27:3

x+1=9

x=9-1

x=8

Vậy x=8

Answer 2

7) \(180-2.\left(x+5\right)^2=130\)

\(2.\left(x+5\right)^2=180-130\)

2.(x+5)²=50

(x+5)²=50:2

(x+5)²=25

x+5=5  hoặc x+5=-5

x=5-5                x=-5-5

x=0                     x=-10

Vậy x=0 hoặc x=-10

Answer 3

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Answer 4

1)300-(2x-4).3=150 

             (2x-4).3=300-150

(2x-4).3=150

 2x-4=150:3

2x-4=50

2x=50-4

2x=46

x=46:2

x=23

Vậy x=23

 

Answer 5

3)x:5-27:5=18

=>(x-27):5=18

x-27=18.5

x-27=90

x=90+27

x=117

Vậy x=117

 

Answer 6

(x+1)^2.2=32

(x+1)^2=32:2

(x+1)^2=16

=>(x+1)^2=4^2

=>x+1=4

x=4-1

x=3

Vậy x=3

Answer 7

5)\(2^{x+1}=64\)

\(\Rightarrow2^{x+1}=2^6\)

\(\Rightarrow x+1=6\)

x=6-1

x=5

Answer 8

10)2.x+3x+4x=180

x(2+3+4)=180

x.9=180

x=180:9

x=20

Vậy x=20