Question

tìm x:

4,5 - 2x . 147 =\(\dfrac{11}{14}\)

Answer 1

Ta có : 4,5 - 2x * 147 = 11/14 .

⇒ 9/2 - 2x * 147 = 11/14 .

⇒ 2x * 147 = 9/2 - 11/14 .

⇒ 2x * 147 = 63/14 - 11/14 .

⇒ 2x * 147 = 26/7 .

⇒ 2x = 26/7 : 147 .

⇒ 2x = ( 26 * 147 ) / 7 .

⇒ 2x = 78 .

⇒ x = 78 : 2 .

⇒ x = 39 .

Vậy x = 39 .

Answer 2

\(4,5-2x\cdot147=\dfrac{11}{14}\\ 2x\cdot147=4,5-\dfrac{11}{14}\\ 2x\cdot147=\dfrac{52}{14}\\ 2x=\dfrac{52}{14}:147\\ 2x=\dfrac{26}{1029}\\ x=\dfrac{26}{1029}:2\\ x=\dfrac{13}{1029}\\ Vậy...\)