x + 13 = 32 - 76

x +13 = 32 + (-76)

x + 13 = -44

x = (-44)-13

x = (-44) + (-13)

x = -57

Vậy x = -57

(-15) + x = (-14) - (-57)

(- 15) + x = (-14) + 57

(-15) + x = 43

x = 43 - (-15)

x = 43 + 15

x = 58

Vậy x = 58.

X/36 = 76/57

=> X = 36x76/57

=> X = 48

x ko tồn tại

48/36

\(x=\dfrac{76}{57}\times36=48\)

\(\dfrac{x}{36}=\dfrac{76}{57}\)

\(\dfrac{x}{36}=\dfrac{4}{3}\)

\(\dfrac{x}{36}=\dfrac{48}{36}\)

\(\Rightarrow x=48\)

x=48

'.''

'ư2[iu9q0wi2

q, ed,x

x : 36 = \(\dfrac{76}{57}\)

x = \(\dfrac{76}{57}\)x 36

x = 48

tick mik nha 

\(\dfrac{x}{36}=\dfrac{76}{57}\)

 => \(\dfrac{x}{36}=\dfrac{4}{3}\)

=> \(\dfrac{x}{36}=\dfrac{48}{36}\)

=> x = 48

\(2x=3y\)\(\Rightarrow\)\(\frac{x}{3}=\frac{y}{2}\)hay   \(\frac{x}{6}=\frac{y}{4}\)

\(5y=4z\)\(\Rightarrow\)\(\frac{y}{4}=\frac{z}{5}\)

suy ra:   \(\frac{x}{6}=\frac{y}{4}=\frac{z}{5}\)

Áp dụng tính chất dãy tỉ số bằng nhau ta có:

       \(\frac{x}{6}=\frac{y}{4}=\frac{z}{5}=\frac{x-y}{6-4}=\frac{57}{2}\)

đến đây bạn làm tiếp nhé

ta có: \(2x=3y\Rightarrow\frac{x}{3}=\frac{y}{2}\Rightarrow\frac{x}{6}=\frac{y}{4}\)

\(5y=4z\Rightarrow\frac{y}{4}=\frac{z}{5}\)

\(\Rightarrow\frac{x}{6}=\frac{y}{4}=\frac{z}{5}\)

ADTCDTSBN

có: \(\frac{x}{6}=\frac{y}{4}=\frac{x-y}{6-4}=\frac{57}{2}\)

=> x/6 = 57/2 => ...

...

z/5 = 57/2 => ...

bn tự tính ik nha!