a) x = 1 4 + 4 7 ⇔ x = 1.7 + 4.4 28 = 23 28 ⇔ x = − 23 28 x = 23 28
b) x − 1 = 7 2 + − 4 − 3 ⇔ x − 1 = 29 6 ⇔ x − 1 = 29 6 x − 1 = − 29 6 ⇔ x = 35 6 x = − 23 6
a) x = 1 4 + 4 7 ⇔ x = 1.7 + 4.4 28 = 23 28 ⇔ x = − 23 28 x = 23 28
b) x − 1 = 7 2 + − 4 − 3 ⇔ x − 1 = 29 6 ⇔ x − 1 = 29 6 x − 1 = − 29 6 ⇔ x = 35 6 x = − 23 6
tìm x , biết:
a) \(x\) : \(4\dfrac{1}{3}\) = -2,5 b) \(\dfrac{3}{5}x\) + \(\dfrac{1}{4}\) = \(\dfrac{1}{10}\)
c) \(2\dfrac{7}{9}\) \(-\) \(\dfrac{12}{13}x\) = \(\dfrac{7}{9}\) d)\(\dfrac{-2}{3}-\dfrac{1}{3}\)\(\left(2x-5\right)=\dfrac{3}{2}\)
Tìm x, biết:
a) 1/4 x + 7/4 x = -6
b) 1/4x + 2x = 9/2
Tìm x,biết:
a,(1/2 + 4/7) : x =_ 3/4
b, 0,5 . x - 1 3/4 = 25 phần trắm
Tìm x biết:a) 10/x = -15/9; b) x/9 = -11/5 : 0,6; c) -7/8 - 2x = -3/4; d) (x-1/2):1/3+5/7=9và5/7; e)1/15.x+4/5.x=5và1/5; f) -1/3<x/6<1/2(x thuộc Z); h) 3/5+2/5:x=-1/4;i) 4 và 3/4x - 3 và 1/2=5/4; k)9/4.(1/3x-1/2)=4và1/2
Tìm x, biết:
a) \(\left(3\dfrac{1}{2}-2.x\right).3\dfrac{1}{3}=7\dfrac{1}{3}\)
b) \(\dfrac{4}{9}.x=\dfrac{9}{8}-0,125\)
c) \(\dfrac{-X}{21}=\dfrac{20}{7}\)
1, Tìm số nguyên x, biết:
a, x - 17 = 23
b, 2(x - 1) = 7 + (-3)
c, 4.(x + 5)3 - 7 = 101
d, 2x+1 .3 + 15 = 39
Bài 2: Tìm x, biết:
a) \(5,2.x+7\dfrac{2}{5}=6\dfrac{3}{4}\)
b) \(2,4:\left(\dfrac{-1}{2}-x\right)=1\dfrac{3}{5}\)
1/ tìm x, biết:
A) 3/2x + 1/4 = -1/7
B) x : 4/7 - 1/7 = 0,5
THỰC HIỆN PHÉP TÍNH NHA MỌI NGƯỜI.
Bài 2: Tìm x, biết:
a) \(x+\dfrac{-7}{15}=-1\dfrac{1}{20}\)
b) \(\left(3\dfrac{1}{2}-x\right).1\dfrac{1}{4}=-1\dfrac{1}{20}\)
Tìm x, biết:
a) \(\dfrac{3}{4}x\) - \(\dfrac{7}{12}\) = \(\dfrac{5}{6}\) - \(\dfrac{2}{3}\)
b) -\(\dfrac{5}{x}\) = \(\dfrac{20}{28}\)
c) \(2\dfrac{1}{3}\) : x = 7
d) \(\dfrac{-105}{12}\) < x < \(\dfrac{20}{7}\)