Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Bài 4: tìm x biết a) 35 – x = 16 – (-2); b) x – 2 = (-7) – 9. c) 15 – x = 11 – (-2); d) x – 1 = (-2) – 3. e) 12

Home/ Toán Lớp 6: Bài 4: tìm x biết a) 35 – x = 16 – (-2); b) x – 2 = (-7) – 9. c) 15 – x = 11 – (-2); d) x – 1 = (-2) – 3. e) 12

Toán Lớp 6: Bài 4: tìm x biết a) 35 – x = 16 – (-2); b) x – 2 = (-7) – 9. c) 15 – x = 11 – (-2); d) x – 1 = (-2) – 3. e) 12

Tháng Mười Hai 5, 2022 Toán học 1 Comment 0 views

Toán Lớp 6: Bài 4: tìm x biết
a) 35 – x = 16 – (-2); b) x – 2 = (-7) – 9.
c) 15 – x = 11 – (-2); d) x – 1 = (-2) – 3.
e) 12 + (2x – 11) = 53; f) 21 – (-6+ 3x) = 9
g) – (2x + 4) + 11 = -27; h) 33 – (33 – x) = 0

Comments ( 1 )

  1. lyly98
    lyly98
    5 Tháng Mười Hai, 2022 at 12:27 sáng
    Reply
    a) $35-x=16-\left(-2\right)$
    $⇔35-x=16+2$
    $⇔35-x=18$
    $⇔35-x-35=18-35$
    $⇔-x=-17$
    $⇔\frac{-x}{-1}=$ $\frac{-17}{-1}$ 
    $⇔x=17$
    $\text{Vậy x = 17}$
    b) $x-2=\left(-7\right)-9$
    $⇔x-2=-7-9$
    $⇔x-2=-16$
    $⇔x-2+2=-16+2$
    $⇔x=-14$
    $\text{Vậy x = -14}$
    c) $15-x=11-\left(-2\right)$
    $⇔15-x=11+2$
    $⇔15-x=13$
    $⇔15-x-15=13-15$
    $⇔-x=-2$
    $⇔\frac{-x}{-1}=$ $\frac{-2}{-1}$ 
    $⇔x=2$
    $\text{Vậy x =2}$
    d) $x-1=\left(-2\right)-3$
    $⇔x-1=-2-3$
    $⇔x-1=-5$
    $⇔x-1+1=-5+1$
    $⇔x=-4$
    $\text{Vậy x =-4}$
    e) $12+\left(2x-11\right)=53$
    $⇔12+2x-11=53$
    $⇔2x+12-11=53$
    $⇔2x+1=53$
    $⇔2x+1-1=53-1$
    $⇔2x=52$
    $⇔\frac{2x}{2}=$ $\frac{52}{2}$ 
    $⇔x=26$
    $\text{Vậy x =26}$
    f) $21-\left(-6+3x\right)=9$
    $⇔21-\left(-6+3x\right)-21=9-21$
    $⇔-\left(-6+3x\right)=-12$
    $⇔\frac{-\left(-6+3x\right)}{-1}=$ $\frac{-12}{-1}$ 
    $⇔-6+3x=12$
    $⇔-6+3x+6=12+6$
    $⇔3x=18$
    $⇔\frac{3x}{3}=$ $\frac{18}{3}$ 
    $⇔x=6$
    $\text{Vậy x =6}$
    g) $-\left(2x+4\right)+11=-27$
    $⇔-\left(2x+4\right)+11-11=-27-11$
    $⇔-\left(2x+4\right)=-38$
    $⇔\frac{-\left(2x+4\right)}{-1}=$ $\frac{-38}{-1}$ 
    $⇔2x+4=38$
    $⇔2x+4-4=38-4$
    $⇔2x=34$
    $⇔\frac{2x}{2}=$ $\frac{34}{2}$ 
    $⇔x=17$
    $\text{Vậy x =17}$
    h) $33-\left(33-x\right)=0$
    $⇔33-\left(33-x\right)-33=0-33$
    $⇔-\left(33-x\right)=-33$
    $⇔\frac{-\left(33-x\right)}{-1}=$ $\frac{-33}{-1}$ 
    $⇔33-x=33$
    $⇔33-x-33=33-33$
    $⇔-x=0$
    $⇔\frac{-x}{-1}=$ $\frac{0}{-1}$ 
    $⇔x=0$

Leave a reply

222-9+11+12:2*14+14 = ? ( )

Lan Lan

About Lan Lan