7 . x - 8 = 713
7. x = 713 + 8
7 . x = 721
x = 721 : 7
x = 103
7 . x - 8 = 713
7 . x = 713 + 8
7 . x = 721
x = 721 : 7
x = 103
Đ/s: ...
7 . x - 8 = 713
=> 7 . x = 713 + 8
=> 7 . x = 721
=> x = 721 : 7
=> x = 103
7x - 8 = 713
7x = 713 + 8
7x = 721
x = 721 : 7
x = 103
7 * x - 8 = 713
7 * x = 713 + 8
7 * x = 721
x = 721 / 7
x = 103
7x - 8 = 713
7x = 713 + 8
7x = 721
x = 721 : 7
x = 103
Vậy: x = 103 nhé bạn :v
7 . x - 8 = 713
7 . x = 713 + 8
7 . x = 721
x = 721 : 7
x = 103
7 * x - 8 = 713
7 * x = 713 + 8
7 * x = 721
x = 721 : 7
x = 103
\(7\times x-8=713\)
\(7\times x=713+8\)
\(7\times x=721\)
\(x=721\div7\)
\(x=103\)
7 * x - 8 = 713
7 * x = 713 + 8
7 * x = 721
x = 721 : 7
x = 103