Question

Sa se afle x din ecuatia : 14,7 - x = 2,49 ×x

Answer 1

$14,7-x=2,49\times x \Rightarrow 14,7= 2,49\times x+x \Rightarrow x+x\times 2,49 = 14,7 \Rightarrow \\ \\ x\cdot(1+2,49) = 14,7 \Rightarrow x\cdot 3,49 = 14,7 \Rightarrow x = \dfrac{14,7}{3,49} \Rightarrow \\ \\ \Rightarrow x = \dfrac{\dfrac{147}{10} } {\dfrac{349}{100}} \Rightarrow x = \dfrac{147}{10}\times \dfrac{100}{349} \Rightarrow x = \dfrac{147\cdot 10}{349}\Rightarrow \\ \\ \Rightarrow x = 0,42120338\cdot 10 \Rightarrow x = 4,2120338$