Question

[Nguyễn Thị Thu Trang]

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

[Trần Minh Hưng]

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

[Trần Minh Hưng]

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