Question

Tìm x, biết:75:(2x+16)-3=5

Answer 1

\(75:\left(2x+16\right)-3=5\)

\(\Rightarrow75:\left(2x+16\right)=5+3\)

\(\Rightarrow75:\left(2x+16\right)=8\)

\(\Rightarrow2x+16=\dfrac{75}{8}\)

\(\Rightarrow2x=\dfrac{75}{8}-16\)

\(\Rightarrow2x=-\dfrac{53}{8}\)

\(\Rightarrow x=-\dfrac{53}{8}:2=-\dfrac{53}{8}.\dfrac{1}{2}\)

\(\Rightarrow x=-\dfrac{53}{16}\)

Answer 2

Ta có :

75 : (2x + 16) - 3 = 5

=> 75 : (2x + 16) = 8

=> 2x + 16 = 75/8

=> x = (75/8 - 16) : 2 

=> x = - 53/16