24.x-32=40 55+5.x=225 2.x+15=134:2 (x-14).39=0

Bạn tham khảo :

$24x - 32 = 40$

$24x =72$

$x = 72 : 24$

$x= 3$

$55+5x = 225$

$5x =170$

$x= \dfrac{170}{5} = 34$

$2x+15 = 134:2$

$2x+15 =67$

$2x = 52$

$x = \dfrac{52}{2} =  26$

$(x-14) . 39 = 0$

$x -14 = 0$

$x = 0+14$

$x=14$