Question

tìm x

10.6 : x + 7.19 : x = 3

7 : x - 3.9 : x = 5

Answer 1

10.6 : x + 7.19 : x = 3

(10,6+7,19):x=3

17,79:x=3

x=17,79:3

x=5,93

7 : x - 3.9 : x = 5

(7-3,9):x=5

3,1:x=5

x=3,1:5

x=0,62

Answer 2

\(a,10,6:x+7,19:x=3\\ \left(10,6+7,19\right):x=3\\ 17,79:x=3\\ x=17,79:3\\ x=5,93\\ b,7:x-3,9:x=5\\ \left(7-3,9\right):x=5\\ 3,1:x=5\\ x=3,1:5\\ x=0,62\)

Answer 3

\(10,6:x+7,19:x=3\)
\(\left(10,6+7,19\right):x=3\)
\(17,79:x=3\)
\(x=\dfrac{17,19}{3}\)
\(x=5,73\)
\(------------\)
\(7:x-3,9:x=5\)
\(\left(7-3,9\right):x=5\)
\(3,1:x=5\)
\(x=\dfrac{3,1}{5}\)
\(x=0,62\)