7x-2x=617:615+44:11
7x-2x=62+44:11
7x-2x=62+4
7x-2x=36+4
7x-2x=40
(7-2)x=40
5x=40
x=40:5
x=8
Chúc bạn học tốt
7x - 2x = 617 : 615 + 44 : 11
\(\Rightarrow\) 5x = 62 + 4
\(\Rightarrow\) 5x = 36 - 4
\(\Rightarrow\) 5x = 32
\(\Rightarrow\) x = 6,4
7x - 2x = 617 : 615 + 44 : 11
7x - 2x = 62 + 4
7x - 2x = 36 + 4
7x - 2x = 40
x(7 - 2) = 40
x5 = 40
x = 40 : 5
x = 8.