Câu hỏi của Nguyễn Kim Anh

Question

(3x-2^4).7^3=2.7^4

Nguyễn Thị Hồng Nhung · Accepted Answer

$\left(3x-2^4\right).7^3=2.7^4\
\Leftrightarrow3x-16=2.7^4:7^3\
\Leftrightarrow3x=14+16\
\Leftrightarrow3x=30\
\Leftrightarrow x=10$

Vậy...Câu trả lời: $\left(3x-2^4\right).7^3=2.7^4\
\Leftrightarrow3x-16=2.7^4:7^3\
\Leftrightarrow3x=14+16\
\Leftrightarrow3x=30\
\Leftrightarrow x=10$

Vậy...

Nguyễn Thanh Hằng · Answer

$\left(2x-2^4\right).7^3=2.7^4$

$\Leftrightarrow\left(2x-2^4\right)=2.7^4:7^3$

$\Leftrightarrow2x-2^4=2.7$

$\Leftrightarrow2x-16=14$

$\Leftrightarrow2x=30$

$\Leftrightarrow x=15$

Vậy ..Câu trả lời: $\left(2x-2^4\right).7^3=2.7^4$

$\Leftrightarrow\left(2x-2^4\right)=2.7^4:7^3$

$\Leftrightarrow2x-2^4=2.7$

$\Leftrightarrow2x-16=14$

$\Leftrightarrow2x=30$

$\Leftrightarrow x=15$

Vậy ..

Dung Nguyen · Answer

( 3x - 24 ) . 73 = 2 . 74

( 3x - 16 ) . 343 = 4802

3x - 16             = 4802 : 343

3x - 16             = 14

3x                     = 14 + 16

3x                     = 30

x                     = 30 : 3

x                     = 10Câu trả lời: ( 3x - 24 ) . 73 = 2 . 74