Question

giúp mình với

Answer 1

\(\dfrac{8}{x+3}=\dfrac{56}{91}\\ \Rightarrow\dfrac{8}{x+3}=\dfrac{8}{13}\\ \Rightarrow x+3=13\\ \Rightarrow x=13-3\\ \Rightarrow x=10\)

Answer 2

\(X=10\)

Answer 3

56:8=7,   91:7=13,   13-3=10

Answer 4

X=10