Question

( 3.x - 16 ) .49= 2.343

Answer 1

\(\left(3x-16\right)\cdot49=2\cdot343\)

=>\(3x-16=2\cdot343:49\)

=>\(3x-16=2\cdot7=14\)

=>3x=16+14=30

=>\(x=\dfrac{30}{3}=10\)

Answer 2

\(\left(3\cdot x-16\right)\cdot49=2\cdot343\\ \Rightarrow\left(3\cdot x-16\right)\cdot49=686\\ \Rightarrow3\cdot x-16=686:49\\ \Rightarrow3\cdot x-16=14\\ \Rightarrow3\cdot x=14+16\\ \Rightarrow3\cdot x=20\\ \Rightarrow x=\dfrac{20}{3}\)

Vậy \(x=\dfrac{20}{3}\)

Answer 3

\(\left(3x-16\right).49=2.343\)

\(=>\left(3x-16\right).49=686\)

\(=>3x-16=686:49\)

\(=>3x=14+16\)

\(=>3x=30\)

\(=>x=30:3\)

\(=>x=10\)

Vậy x = 10.

\(#NqHahh\)

Answer 4

(3.x-16).49=2.343

(3.x-16).49=686

(3.x-16)     =686:49

3.x-16        =14

3.x              =14+16

3.x              =30

   x              =30:3

   x              =10

Vậy x=10