Question

Tìm x biết :165-(35:x+3).19=13

Answer 1

=> (35 : x + 3) . 19 = 152

=> 35 : x + 3 = 8

=> 35 : x = 5

=> x = 7

Answer 2

(35*x+3)*19=165-13

(35*x+3)*19=152

35*x+3=152/19

35*x+3=8

35*x=8-3

35*x=5

x=35/5

x=7

Answer 3

\(165-\left(35\div x+3\right).19=13\)

\(\Leftrightarrow\)\(\left(35\div x+3\right).19=165-13\)

\(\Leftrightarrow\)\(\left(35\div x+3\right).19=152\)

\(\Leftrightarrow\)\(\left(35\div x+3\right)=152\div19\)

\(\Leftrightarrow\)\(35\div x+3=8\)

\(\Leftrightarrow\)\(35\div x=8-3\)

\(\Leftrightarrow\)\(35\div x=5\)

\(\Leftrightarrow\)\(x=35\div5\)

\(\Leftrightarrow\)\(x=7\)