Question

giải phương trình sau:

(x-17)/33+(169-x)/23+x/25=4

 

Answer 1

\(\frac{x-17}{33}+\frac{169-x}{23}+\frac{x}{25}=4\)

\(\Rightarrow575.\left(x-17\right)+825.\left(169-x\right)+759x=75900\)

\(\Rightarrow575x-9775+139425-825x+759x-75900=0\)

\(\Rightarrow509x=-53750\)

\(\Rightarrow x=\frac{-53750}{509}\)

Answer 2

sử dụng tỉ lệ con nhà bà thức ta có (:|

\(\Leftrightarrow\frac{509x+129650}{18975}=\frac{4}{1}\Rightarrow\left(509x+129650\right)1=18975.4\)

\(\Rightarrow\frac{\left(509x+129650\right)1}{509x}=\frac{18975.4}{509x}\)

\(\Rightarrow\frac{509x+129650}{509x}=\frac{18975.4}{509x}\)

\(\Rightarrow x=-105,599214145383\)