( - 72 ) . ( - 23 + 2x ) = ( - 49 ) . ( - 23 + 14 )
( - 72 ) . ( - 23 + 2x ) = ( - 49 ) . ( - 9 )
( - 72 ) . ( - 23 + 2x ) = 441
- 49 . ( - 23 + 2x ) = 441
- 23 + 2x = 441 : ( - 49 )
- 23 + 2x = - 9
2x = - 9 - ( - 23 )
2x = 14
x = 14 : 2
x = 7
(-7^2)*(-23+2x)=(-49)*-(-23+14)
Trả lời:x=...
49 8/23-(5 7/32+14 8/23) =?
49.(-23+2.x)=(-49).(-23+14)
A = 49/8/23 - (5/7/32+14/8/23)
tính:
\(49\frac{8}{23}-\left(5\frac{7}{32}+14\frac{8}{23}\right)\)
a) 57 x 23 + 23 x 44 - 23
B)1672-[49 + (13-7)3]
C)50 : {2.[52-(3 . 5 - 22 . 3)3]}
D) -2014 + ( -999) +14 + (-2001)
4×7/9×23
2×21/14×15
2×5×13/26×35
9×6-9×3/18
17×5-17/3-20
49+7×49/49
A = 49 8/23-(5 7/32+14 8/23)
B= 71 38/45-(43 8/45-1 17/57)
tính hợp lí giá trị biểu thức sau :
\(49\frac{8}{23}-\left(5\frac{7}{32}+14\frac{8}{23}\right)\)
