Môn Toán Lớp 7: Tìm x, biết: 3/4+2/5x =29/60.kết quả x bằng:

$\frac{3}{4}$ + $\frac{2}{5}$ . x = $\frac{29}{60}$                         

$\frac{2}{5}$ . x = $\frac{29}{60}$ – $\frac{3}{4}$

$\frac{2}{5}$ . x = $\frac{29}{60}$ – $\frac{45}{60}$

$\frac{2}{5}$ . x = $\frac{-16}{60}$

x = $\frac{-16}{60}$ : $\frac{2}{5}$

x = $\frac{-16}{60}$ . $\frac{5}{2}$

x = $\frac{-8}{12}$ . $\frac{1}{1}$

x = $\frac{-8}{12}$

x = $\frac{-2}{3}$

    Vậy x = $\frac{-2}{3}$