Question

Tìm x:

X + X x 3 + 5 x 3 = 75

Answer 1

\(x+x\cdot3+15=75\)

\(x\cdot\left(1+3\right)=60\)

\(x\cdot4=60\)

\(x=15\)

Dấu " . " là dấu nhân

Học tốt nhé :))

Answer 2

\(x+3x+5.3=75\)

<=> \(4x+15=75\)

<=> \(4x=60\)

<=> \(x=15\)

học tốt

Answer 3

\(x+x\cdot3+5\cdot3=75\)

\(\Rightarrow x+x\cdot3+15=75\)

\(\Rightarrow x+x\cdot3=60\)

\(\Rightarrow x\left(1+3\right)=60\)

\(\Rightarrow x\cdot4=60\)

\(\Rightarrow x=15\)

Answer 4

\(x+x\times3+5\times3=75\)

\(x+x\times3+15=75\)

\(x\times\left(1+3\right)+15=75\)

\(x\times\left(1+3\right)=60\)

\(x\times4=60\)

\(x=60:4=15\)

Answer 5

Tìm x : 

X + X × 3 + 5 × 3 = 75 

X × 1 + X × 3 + 15 = 75 

X × ( 1 + 3 ) + 15 = 75 

X × 4 + 15  = 75

X × 4 = 75 - 15

X × 4 = 60

X = 60 : 4 

X = 15

Vậy X = 15 

Answer 6

x=15

hok tốt