a) -x +8=-17-30
-x+8+17+30=0
-x+55=0
-x=-55
x=55
b) 35-x=37
x=-2
c)(-19-x)+23=-20
-19-x+23+20=0
24-x=0
x=24
d) ( x-45):2=-17
x-45=-34
x=11
a) -x + 8 = -17 - 30
-x + 8 = -47
-x = -47 - 8
-x = -55
=> x = 55
Vậy x = 55
b) 35 - x = 37
x = 35 - 37
x = -2
Vậy x = -2
c)( -19 - x) + 23 = -20
(-19 - x) = -20 - 23
-19 - x = -43
x = -19 - (-43)
x = 24
Vậy x - 24
d)(x - 45) : 2 = -17
x - 45 = -17 . 2
x - 45 = -34
x = -34 + 45
x = 11
Vậy x = 11
a) -x + 8 = -17 - 30 b) 35 - x = 37 c) ( -19 - x ) + 23 = -20 d) ( x - 45 ) : 2 = -17
-x + 8 = -47 x = 35 -37 -19 - x = -20 - 23 x - 45 = -17 * 2
-x = -47 - 8 x = -2 -19 - x = -43 x - 45 = -34
-x = -55 Vậy x = -2 x = -19 - ( -43) x = -34 + 45
=> x = 55 x = 24 x = 11
Vậy x = 55 Vậy x = 24 Vậy x = 11