460+85x4=(x+175):5+30
<=>460+340=x.1/5+175.1/5+30
<=>800=1/5x+35+30
<=>735=1/5.x
<=>x=3675
Chúc bạn học tốt ^_^
460 + 85 x 4 = ( x+ 175 ) : 5 + 30
= 460 + 340 = ( x + 175 ) : 5 + 30
= 800 = ( x + 175 ) : 5 + 30
= ( x + 175 ) : 5 = 800 - 30
= ( x+ 175 ) : 5 = 770
= ( x +175 ) = 770 x 5
= x + 175 = 3850
x = 3850 - 175
x = 3675