-12(x-5)+7(3-x)=5
-12*x-(-12)*5+7*3-7*x=5
-12*x+12*5+7*3-7*x=5
-12*x-7*x+60+21=5
-19*x+81=5
-19*x=5-81
-19*x=-76
x=-76:(-19)
x=4
-12(x-5)+7(3-x)=5
-12*x-(-12)*5+7*3-7*x=5
-12*x+12*5+7*3-7*x=5
-12*x-7*x+60+21=5
-19*x+81=5
-19*x=5-81
-19*x=-76
x=-76:(-19)
x=4
tinh: -12(x-5)+(3-x).7=5
tinh -12(x-5)+7(3-x)=5
1, tim x
5+x-3=5-(x+4)
x-(5|-7|+3)=|-8|+6-2
|x-3|+7
12-3|x-1|=6
cac ban giup minh nhe nho cac buoc tinh ro rang nha minh se like cho
tinh :
5^12 x 7 - 5^11 x 10
tinh hop li:
12-12+11+10-9+8-7+5-4+3+2-1
tim so nguyen x :
3x+27=9
2x+12=3(x-7)
2x^2-1=49
-|9-x|-5=12
cho:A=(-a-b+c)-(-a-b-c)
a)rut gon A
b)tinh gia tri cua A khi a=1;b= -1;c= -2
1. tinh :
a) 15/8 + 3/4 - 5/12
b) 11/24 x 12/33 + 5/6
c) 15/8 + 7/24 : 5/8
2 . tim x, biet :
a) x + 5/8 : 3/4 = 17/9
b) x - 5/9 x 18/15 = 1/3
c) x x7/8 - 5/8 = 13/24
d) X x1/7 + X x 1/4 + X x 1/4 =18
giup mik nhanh nha. mik can gap lam
bài 1:Thực hiện phép tinh
a, x+ 5 = 2015 - (12 -7)
b, -7|x+3| = -49
c, (105 - x) : 25 = 20150 + 1
1 tinh va so sanh
[(-2)+4]+3=...
(-2)+(4+3)=
[(-2)+3]+4
2 tinh nhanh
(-12)+(-35)+(-8)
(-37)+65+(-12)+(-1)
3 tinh
(-214)+(-120)+(-12)
123+(-176)+(-203)+17
4tim tong cac so nguyen x ,biet
-3<x<4
-4<x<4
5 tinh
7+(-13)+5+(-7_+8+(-15
117+(-332)+(-117)+(-18)
5Pgiup mk ti nha
mk tick cho
a) -12+(x-9)<0 tìm x thuộc Z
b)x-(13-x)=-24+(-7+x)
c) (x - 7)+( 5-x)=12-(-8+x)
d)5(x-6)-2(x+3)=12
e)3(x-4)-(8-x)=12
f) 7(x-3)-5(3-x)=11x-5
g) 7(x-9)-5(6-x)=-6+11x