Question

a)     x x 2,9 + x : 10 = 2,4 

b)    x : 0,25 – x x 0,25 = 1,8

Answer 1

a) \(x.2,9+x:10=2,4\)

⇔ \(29x+x=24\)

⇔ \(30x=24\)

⇒ \(x=\dfrac{4}{5}\)

b) \(x:0,25-x.0,25=1,8\)

⇔ \(x-\dfrac{x}{16}=\dfrac{9}{20}\)

⇔ \(\dfrac{15x}{16}=\dfrac{9}{20}\)

⇒ \(x=\dfrac{12}{25}\)

Answer 2

\(a,\Rightarrow x\times0,9+x\times0,1=2,4\\ \Rightarrow x\times\left(0,9+0,1\right)=2,4\\ \Rightarrow x\times1=2,4\\ \Rightarrow x=2,4\)