a) \(7\times\left(10-3\right)-8\times\left(2-9\right)\)
\(=7\times7-8\times\left(-7\right)\)
\(=49-\left(-56\right)\)
\(=49+56\)
\(=105\)
b) \(-17\times\left(13+5\right)-13\times\left(17-2\right)\)
\(=-17\times18-13\times15\)
\(=-306-195\)
\(=-501\)
HOK TOT
(1890-19-5)-(19-5+1890)
loi giai chi tiet
Bo ngoac roi tinh
Bo dau ngoac roi rut gon bieu thuc :
a) - ( - 12 + 25 - 36 ) - ( 12 - 36 + 57 )
b) - ( 23 + 5 - 6 + 17 ) + ( 23 - 5 - 83 - 6 )
c) 12 . ( 6 - 7 - 8 ) - 10 . ( 11 + 12 - 13 )
Giup minh voi minh dang can rat gap
31/17 +-5/13+-8/13 -14/17
giai chi tiet nhe hop li thuan tien
Tim x, biet:
1) -5.(2-x)+4.(x-3)=10.x-15
2) 2.(7x-14)-7.(3x-5)=28
3) 17+x=7+6.x
4) 4.!x-2!=8
5) 4.x-5.(-3+x)=7
mik dag gap lam tra loi nhanh va chi tiet giup mik
giup minh 2 cau nay nhe
a 3.(x+5)-8=x+17
b/ 5(x+3)-10=2x-19
giup minh nhe minh bay gio can gap lam mai minh phai nop roi
Tinh nhanh:1+3-5-7+9+11-....-397-399
ai lam nhanh nhat mik tick cho1 giai chi tiet ra nhe
bo ngoac roi tinh:a)30+12+(-20)+(-12) ;b)(-5)+(-10)+16+(-1)
tim cac sn x biet :
|x+1| = 2^3 -1
|2-x|=5
-2. (x+6)+6.(x-10)=8
-4 . (2x+9)-(-8x+3)- (x+13) = 0
cac ban giai dung va chi tiet nha trong toi nay
a,-2.(x-6)+6.(x-10)=8
b,-4.(2x+9)-(8x+3)-(x+13)=0
c,7x.(2+x)-7x.(x+3)=14
Giải chi tiết nha!!!!!!!!
