a. 4 . x : 17= 0; b. 7.x-8=713; c. 3.x+12=57 01/09/2021 Bởi Savannah a. 4 . x : 17= 0; b. 7.x-8=713; c. 3.x+12=57
a) 4 . x ÷ 17 = 0 4 . x = 0 . 17 4 . x = 0 x = 0 ÷ 4 x = 0 Vậy x = 0 b) 7 . x – 8 = 713 7 . x = 713 + 8 7 . x = 721 x = 721 ÷ 7 x = 103 Vậy x =103 c) 3 . x + 12 = 57 3 . x = 57 – 12 3 . x = 45 x = 45 ÷ 3 x = 15 Vậy x = 15 Bình luận
$\text{a) 4x ÷ 17 = 0.}$ $\text{⇒ 4x = 0.17}$ $\text{⇒ 4x = 0.}$ $\text{⇒ x = 0.}$ $\text{Vậy x = 0.}$ $\text{b) 7x – 8 = 713.}$ $\text{⇒ 7x = 713 + 8.}$ $\text{⇒ 7x = 721.}$ $\text{⇒ x = 721 ÷ 7}$ $\text{⇒ x = 103.}$ $\text{Vậy x = 103.}$ $\text{c) 3x + 12 = 57.}$ $\text{⇒ 3x = 57 – 12.}$ $\text{⇒ 3x = 45.}$ $\text{⇒ x = 45 ÷ 3.}$ $\text{⇒ x = 15.}$ $\text{Vậy x = 15.}$ Bình luận
a) 4 . x ÷ 17 = 0
4 . x = 0 . 17
4 . x = 0
x = 0 ÷ 4
x = 0
Vậy x = 0
b) 7 . x – 8 = 713
7 . x = 713 + 8
7 . x = 721
x = 721 ÷ 7
x = 103
Vậy x =103
c) 3 . x + 12 = 57
3 . x = 57 – 12
3 . x = 45
x = 45 ÷ 3
x = 15
Vậy x = 15
$\text{a) 4x ÷ 17 = 0.}$
$\text{⇒ 4x = 0.17}$
$\text{⇒ 4x = 0.}$
$\text{⇒ x = 0.}$
$\text{Vậy x = 0.}$
$\text{b) 7x – 8 = 713.}$
$\text{⇒ 7x = 713 + 8.}$
$\text{⇒ 7x = 721.}$
$\text{⇒ x = 721 ÷ 7}$
$\text{⇒ x = 103.}$
$\text{Vậy x = 103.}$
$\text{c) 3x + 12 = 57.}$
$\text{⇒ 3x = 57 – 12.}$
$\text{⇒ 3x = 45.}$
$\text{⇒ x = 45 ÷ 3.}$
$\text{⇒ x = 15.}$
$\text{Vậy x = 15.}$