Question

285*x+115*x=400

 

Answer 1

285*x+115*x=400

(285+115)*x=400

400*x=400

x=400/400

x=1

ai k mk k lai cho

Answer 2

285*x+115*x=400

x*(285+115)=400

x*400=400

x=400/400=1                 

Answer 3

285*x+115*x=400

(285+115)*x=400

400*x=400

x=400/400

x=1

Answer 4

Trả lời:

\(285\times x+115\times x=400\)

\(\Rightarrow x\times\left(285+115\right)=400\)

\(\Rightarrow x\times400=400\)

\(\Rightarrow x=400\div400\)

\(\Rightarrow x=1\)