460+85x4=x+175:5+30
460+340=x+35+30
800=x+65
800-65=x
735=x hay x = 135
460 + 85.4 = ( x + 200 ) : 4
460 + 340 = ( x + 200 ) : 4
800 = ( x + 200 ) : 4
x + 200 = 3200
=> x = 3000
460 - 85 x 4 = ( X + 200 ) : 4
460 + 340 = (X + 200 ) : 4
800 = ( X + 200 ) : 4
X + 200 = 3200
X = 3200 - 200
X = 3000