Question

66 : ( 2x - 3 ) -22 =0

74 . ( x - 2 ) - 2³ . 3 = 2.5²

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Answer 1

\(66:\left(2x-3\right)-22=0\Leftrightarrow66:\left(2x-3\right)=0+22\)

\(\Leftrightarrow66:\left(2x-3\right)=22\Leftrightarrow2x-3=66:22\Leftrightarrow2x-3=3\)

\(\Leftrightarrow2x=3+3\Leftrightarrow2x=6\Rightarrow x=6:2\Leftrightarrow x=3\)

\(74.\left(x-2\right)-2^3.3=2.5^2\Leftrightarrow74.\left(x-2\right)-8.3=2.25\)

\(\Leftrightarrow74.\left(x-2\right)-8.3=50\Leftrightarrow74.\left(x-2\right)-24=50\)

\(\Leftrightarrow74.\left(x-2\right)=50+24\Leftrightarrow74.\left(x-2\right)=74\)

\(\Leftrightarrow x-2=74:74\Leftrightarrow x-2=1\Leftrightarrow x=1+2\Leftrightarrow x=3\)

Answer 2

66 : ( 2x - 3 ) -22 =0

66 : ( 2x - 3 ) = 22

2x-3=66:22

2x-3=11

2x=11+3

2x=14

x=14:2

x=2

Answer 3

66 : ( 2x - 3 )  - 22 =0 

<=> 66 : ( 2x - 3 ) = 22

<=> 2x - 3 = 66 : 22 = 3

<=> 2x = 6

<=> x =3 

74 . ( x -2 ) - 2³ . 3 = 2 . 5²

<=>  74 ( x -2 ) - 24 = 50

<=> 74 ( x- 2 ) = 50 + 24 = 74

<=> x - 2 = 1

 <=> x = 3 

Answer 4

bn chọn đáp án của

Mai Thi Thanh Hoa ấy nhé

Answer 5

66 : ( 2x - 3 ) - 22 = 0

66 : ( 2x - 3 ) = 0 + 22

66 : ( 2x - 3 ) = 22

2x - 3 = 66 : 22

2x - 3 = 3

2x = 6

x = 3