Bài 3. Tìm số nguyên x, biết:
a) x - 6 = 1 b) 23 - x = 0
c) 2x - 8 = 12 d) 2x - ( -1) = 1
e) (135 + x) - 135 = 0; f) ( -562) - (x- 562) = 0
Bài 3. Tìm số nguyên x, biết:
a) x - 6 = 1. b) 23 - x = 0
c) 2x - 8 = 12 d) 2x - ( -1) = 1
e) (135 + x) - 135 = 0; f) ( -562) - (x- 562) = 0
Tìm số nguyên x, biết: a) x - 6 = 1 b) 23 - x = 0 c) 2x - 8 = 12 d) 2x - ( -1) = 1
bài1: tính nhanh
a, 89 + ( -36 ) + ( -8 ) + 29 + 15 + ( -34 )
b, -195 . 56 -43 . 195 - 195
c, 135 . ( -12 + 147 ) - 147 . ( 135 - 12 )
bài 2 : tìm x
a, 3-(17-x) = -12
b, -26-(x-7)= 0
c, /x+3/-7=13
d, /x-7/+15=23
e, (x+2)(x+3)=0
g, (x-1)( x^2+1)=0
b) -26 - ( x - 7 ) = 0
x - 7 = -26 - 0
x - 7 = -26
x = -26 + 7
x = -19
Bài 2 :
a) 3 - ( 17 - x ) = -12
( 17 - x ) = 3 - ( -12 )
( 17 - x ) = 15
x = 17 - 15
x = 2
b) -26 - ( x - 7)=0
x - 7 = -26 -0
x - 7 = -26
x = -26 + 7
x = -19
Tìm số nguyên x, biết:
a) (135 + x) - 135 = 0; b) ( -562) - ( x- 562) = 0;
c) 61 + ( x - 23) = 91; d) 11- ( -53 + x) = 97.
a) 135 + x -135 = 0 => (135 - 135) + x = 0 => x = 0.
b) -562 - x + 562 = 0 => (-562 + 562) - x = 0 => - x = 0 => x = 0.
c) 61 + x - 23 = 91=> (61 - 23) + x = 91=>38 + x = 91=> x = 53.
d) 11 + 53 - x = 97 => 64 - x = 97 => x = 64 - 97 => x = - 33
Tìm số nguyên x, biết: a) (135 + x) - 135 = 0; b) ( -562) - ( x- 562) = 0; c) 61 + ( x - 23) = 91; d) 11- ( -53 + x) = 97.
a)(14-x)-12=5
b)(2x+7)+135=0
c)(162+3x)+(x-2)=0
d)720-(3+2x)=1
e)/2x+1/<2
f)2/x=3/15
a. -3
b. -71
c. -40
d. 358
e. ?i
f. 10
mình chỉ cho đáp án được thôi vì mình đang gấp nên ko thể trình bày được, câu e mình ko hiểu bạn ghi gì hết. bạn gửi lại câu e đi.
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrjrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr hãy tìm chữ j
A.(14-x)-12=5
14-x =5+12
14-x =17
x =14-17
x =-3
B.(2x+7)+135=0
2x+7 =0-135
2x+7 =-135
2x =(-135)-7
2x =-142
x =(-142):2
x =-71
C.(162+3x)+(x-2)=0
(162+3x)+x-2=0
(162+3x)+x=0+2
(162+3x)+x=2
162+3x+x=2
3x+x=2-162
4x=-160
x=(-160):4
x=-40
D.720-(3+2x)=1
3+2x=720-1
3+2x=719
2x=719-3
2x=716
x=716:2
x=358
E. K biết làm -_- :)
F.K biết làm -_- :))
1/Tính hợp lí:
a) (-5)5 .(-19).32.(-2005)0
b) (-195).(+56)-43.195-195
c)-37.520+(-260).16-90.(-160)
d)135.(-12+ 147)-147.(135-12)
2/Tìm x thuộc Z
a)3.(x+2)-6.(x-5)=2.(5-2x)
b)(-2x).(-4x)+28=100
c)5x.(-x)2 + 1=6
d)3x2 + 12x=0
e)4x3 =4x
f)(x-1).(x+1)+2=0
MẤY BẠN CHỊU KHÓ LÀM NHA,ĐANG CẦN GẤP LẮM(40 PHÚT)
1/Tính hợp lí:
a) (-5)5 .(-19).32.(-2005)0
b) (-195).(+56)-43.195-195
c)-37.520+(-260).16-90.(-160)
d)135.(-12+ 147)-147.(135-12)
2/Tìm x thuộc Z
a)3.(x+2)-6.(x-5)=2.(5-2x)
b)(-2x).(-4x)+28=100
c)5x.(-x)2 + 1=6
d)3x2 + 12x=0
e)4x3 =4x
f)(x-1).(x+1)+2=0
MẤY BẠN CHỊU KHÓ LÀM NHA,ĐANG CẦN GẤP LẮM(40 PHÚT)
cái gì thế này???????????????????????????????????
mik lp 6 nhưng nhìn bài của bn mik ko hiểu j cả luôn ý