x+30=-4
x =(-4) -30
x =-34
Vậy x=-34
x+30=-4
x =-4-30
x =-34
Tìm x sao cho:
a) 18 - x = 58 - (-30)
b) x - 27 = (-43) - 9
c) 169 - (x + 4) = 69
d) (5x + 3) - (-24 + 4) = 33
e) 225 - (5x + 10) : 25 + 5 = -(-20)
\(\left(x-2\right)^3+\frac{8}{27}=0\)
\(4\frac{1}{3}:\frac{x}{4}=6:0,3\)
(0,25-30%x).\(\frac{1}{3}-\frac{1}{4}=5\frac{1}{6}\)
\(\frac{x-2}{\frac{-2}{9}}=\frac{-2}{x-2}\)
Tìm x biết
y+30%y=-1,3
y-0.25%y=1/2
0,5x+2/3*x=7/12
(3x/7+1)/(-4)=-1/8
các bạn làm giúp mình nha khó quá!
1. Rút gọn biểu thức:
a, x + (-30) - [95 + (-40) + (-30)]
b, a + (273 - 120) - (270 - 120)
c, b - (294 + 130) + (94 + 130)
2. Đơn giản biểu thức sau khi bỏ ngoặc:
a, -a - (b - a - c)
b, -(a - c ) - (a - b + c)
c, -( a - b + c) - (a + b + c)
1, 7x+6(3-x)=27-20+73
2,6x-5(x-7)=(27-514)-486-73)
3,2x-6=3(x-5)+25+27-15-17
4, 4(x-5)-3(x+5)=2579-2578
5,/x-5/-7(x+4)=5-7x
6,3/x+4/-2(x-1)=7-2x
7, 2/x-6/+7x-2=/x-6/+7x
8,/x+8/+5(x-2)=5x-10:2
9, /x+2/-6(x-4)=20-6x
x + 4 = -2
x + 8 = ( -5 ) + 4
Tim X :
a)x:1/3+2/3[1/5-1] =4
b)1/2 [x-3/5]=-1/3[7/6-3/2]
c)1/3-3/4=3/5 -x
d)4/7x-2/3=1/3+x
a. x + 4 = -2
b. x + 8 = ( -5 ) + 4
c. tim so nguyen x, biet rang tong cua ba so : 3, -2 va x bang 5