(x-5)+10=20
(x-5)=20-10
(x-5)=10
x=10+5
x=15
(x-5)+10=20
(x-5)=20-10
(x-5)=10
x=10+5
x=15
Tính (−5)+(−10)+(−15)−(−20+x)(−5)+(−10)+(−15)−(−20+x)
Bài 1: Tìm x
a. (-20) + x = -30 b. (-10) - x = -20
c. -10 + (-2) = -4 d. x + (-3) = -7
e. x - (-5) = -9 f. x (-11) = 12
h. 2x - 10 = 20 l. 4x - 8 = -8
k. -12 - (-2)x = -8
Bài 2: Tìm x
a. -20 - (10-x) = -3
b. 14 + (14-x) = -2
c. -15 - (x-3) = -7
d. (x+4) + (-20) = -8
e. -2x - 2 = -4
f. -2x + 4 = -4
l. -12 - (-2)x = -2 -4
Thank mn ạaa!!
|x +10| - (5 - 3x) = (4x - 10) - (x - 5)
|3x + 21| - ( 10 - 5x ) = 5x - |-20|
tìm x
x+8/10=17/18-17/20
x-1/10=1/15
(3/5-2)+13/20=5/6
Tìm x
a, 2x- (-1) = 3
b, (x + 1) -5 = -3
c, 5 - (x - 2) = 4
d, 10 + (x - 3 ) = 5
e, 15 - x = -12
g, 20 + ( -x ) = 30
h, x - 10 = -20
i, x + 20 = -5
bài 1:tìm x biết
a,(125-x)+25=98
b,100:(x+20)=68:34
c,(3.x+12).5=25.4-10
d,210:(2.x-3)-20=10
\(\dfrac{3}{20}\)x\(\dfrac{7}{16}\)+\(\dfrac{3}{20}\)x\(\dfrac{5}{16}\)+\(\dfrac{3}{20}\)\(\dfrac{3}{10}\)
20 : ( x - 5) = 4 . 25 - 20
( 4 + 3) ( x -5) + 14 = 25 + 124 : 4
49 . x - 14 .x = 49 . 10 - 70
tìm x :
5 + 10 = 20 - x
10 + 40 = 50 - x
5x+8 + 5x+7 + 5x+6 - 11. 510 = 510. 20