Question

tìm x biết 5.(x+6) =x.(5+10)

Answer 1

5 ( x + 6 ) = x ( 5 + 10 )

5x + 30 = 5x + 10x

5x - 5x - 10x = - 30

- 10x = - 30

x = - 30 : ( - 10 )

x = 3

Answer 2

\(5.\left(x+6\right)=x.\left(5+10\right)\)

\(\Rightarrow5x+30=15x\)

\(\Rightarrow5x-15x=-30\)

\(\Rightarrow-5x=-30\)

\(\Rightarrow x=6\)

Vậy x = 6

Answer 3

Mk nhầm \(5.\left(x+6\right)=x.\left(5+15\right)\)

\(\Rightarrow5x+30=15x\)

\(\Rightarrow5x-15x=-30\)

\(\Rightarrow-10x=-30\)

\(\Rightarrow x=3\)

Answer 4

Áp dụng tính chất phân phối : 

5 . ( x + 6 ) = x . ( 5 + 10 )

=> 5x + 30 = 5x + 10x

=> 5x - 5x - 10x = -30

=> -10x = -30

=> x     = ( -30 ) : ( -10 )

=> x     = 3

Answer 5

\(5\left(x+6\right)=x\left(5+10\right)\)

\(5x+30=15x\)

\(5x-15x=-30\)

\(-10x=-30\)

\(x=3\)