Question

x * 5 = 40 - x *3

Answer 1

<=> 5x = 40 - 3x

<=> 5x + 3x =  40

<=>     8x =  40

<=>       x =  40 : 8

 <=>      x =      5

Answer 2

x*5 = 40-x*3

x*5+x*3=40

x*8 =40

   x=5

bn hok tốt nha!!

Answer 3

=> 5x = 40 - 3x

=> 5x + 3x =  40

=>     8x =  40

=>       x =  40 : 8

=>      x =      5

Answer 4

\(40-x\times3=x\times5\)

\(\Rightarrow x\times5+x\times3=40\)

\(\Rightarrow x\left(5+3\right)=40\)

\(\Rightarrow x\times8=40\)

\(\Rightarrow x=40\div8\)

\(\Rightarrow x=5\)