A) 34 + ( 9 - 21 ) = 3417 - (0 + 3417)
B) 9 - ( 55 - ( 49 + (-28 - 5 ))) = 13 -( 47 + -25 - 32 - 8 ))
C) |-1 - 1| - 1 + 1 = 0
D) |2 - 2| + 2 = 2
34+(9-21)=3417-(x+3417)
x-{55-[49+(-28-x)]}=13-{47[25-(32-x)]}
tìm x \(\in\)Z biết
a) 34+(9-21)=3417-(x+341)
b)(15-x)+(x-12)=7-(-8+x
c) x-{55-[49+(-28-x)]}=13-{47+[25-(32-x)]}
d) -7+lx+4l=-3
e) lx-10l-(-12)=4
Tìm x thuộc Z biết :
a) x - { 55 - [ 49 + ( -28 - x ) ] } = 13 - { 47 + [ 25 - ( 32 - x ) ] }
b) | x - 1 | - x + 1 = 0
c) | 2 - x | + 2 = x
a)Tìm x thuộc Z,biết:
x-{55-[49+(-28-x)]}=13-{47+[25-(32-x)]}
b)Tính
-1+2+3-4-5+6+7-8-9+...+99-100+101
Tìm x thuộc Z,biết:
x-{55-[49+(-28-x)]}=13-{47+[25-(32-x)]}
Tính
A, 34+(9-21)=3417-(x+3417)
B, (15-x)+(x-21)=7-(-8+x)
34 + ( 9-21) = 3417 - ( x + 3417)
34 + (9 -21) = 3417 - ( x +3417)
Bai 1
Thuc hien phep tinh
a,(135-35) .(-47)+53 .(-48-52)
b,25 .(75-49)+75 .|25-49|
Bai 2
Tim x\(\varepsilon\)Z biet
a,(-x+31)-39=-69+11
b,x-{57-[42+(-23-x)]}=13-{47+[25-(32-x)]}
c,|2-x|+2=x
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