1)6x-8=3x+1

6x-3x=1+8

3x=9

x=3

Vậy x=3

2: 12-10x=25-30x

=>20x=13

=>x=13/20

3: \(3\left(2x+3\right)-2\left(4x-5\right)=10x+21\)

=>6x+9-8x+10=10x+21

=>10x+21=-2x+19

=>12x=-2

=>x=-1/6

4: \(\Leftrightarrow25x-15-6x+12=11-5x\)

=>19x-3=11-5x

=>24x=14

=>x=7/12

5: \(\Leftrightarrow8-12x-5+10x=4-6x\)

=>4-6x=-2x+3

=>-4x=-1

=>x=1/4

6: \(\Leftrightarrow32x-24-6+9x=13-40x\)

=>41x-30=13-40x

=>81x=43

=>x=43/81

7: \(\Leftrightarrow10x-5+20x=5x-11\)

=>30x-5=5x-11

=>25x=-6

=>x=-6/25

Các bn giúp mình với mình đang cần gấp

nhiều quá bạn ơi , mk nghĩ bạn nên tách ra rồi hãy đăng lên

Mik không làm đc phần e nha!!

Mình làm ý e) hộ nhé !

x + 2x + 3x + ... + 10x = 110

x ( 1 + 2 + 3 + ... + 10 ) = 110

x . 10 ( 10 + 1 ) / 2 = 110

x . 55 = 110 ⇒ x = 2

\(-\dfrac{3}{5}\times x+\dfrac{1}{2}=\dfrac{4}{5}\)

\(-\dfrac{3}{5}\times x=\dfrac{4}{5}-\dfrac{1}{2}\)

\(-\dfrac{3}{5}\times x=\dfrac{3}{10}\)

\(x=\dfrac{3}{10}:-\dfrac{3}{5}\)

\(x=-\dfrac{1}{2}\)

Vậy \(x=-\dfrac{1}{2}\)

\(\dfrac{1}{2}\times x+\dfrac{3}{8}=\dfrac{7}{16}\)

\(\dfrac{1}{2}\times x=\dfrac{7}{16}-\dfrac{3}{8}\)

\(\dfrac{1}{2}\times x=\dfrac{1}{16}\)

\(x=\dfrac{1}{8}\)

Vậy \(x=\dfrac{1}{8}\)

\(\dfrac{2}{3}x-\dfrac{5}{6}x=-\dfrac{1}{2}\)

\(x\times\left(\dfrac{2}{3}-\dfrac{5}{6}\right)=-\dfrac{1}{2}\)

\(x\times\dfrac{-1}{6}=-\dfrac{1}{2}\)

\(x=3\)

Vậy \(x=3\)

\(\dfrac{2}{5}x+\dfrac{3}{10}x=-\dfrac{1}{5}\)

\(x\times\left(\dfrac{2}{5}+\dfrac{3}{10}\right)=-\dfrac{1}{5}\)

\(x\times\dfrac{7}{10}=-\dfrac{1}{5}\)

\(x=-\dfrac{2}{7}\)

Vậy \(x=-\dfrac{2}{7}\).

1)8(4x-3)-3(2-3x)=13-40x

(32x-24)-(6-9x)=13-40x

32x-24-6+9x=13-40x

41x-30=13-40x

41x+40x=13+30

81x=43

x=43/81

Vậy x=43/81

2)10x-5(1-4x)=5x-11

10x-(5-20x)=5x-11

10x-5+20x=5x-11

30x-5=5x-11

30x-5x=5-11

25x=-6

x=-6/25

Vậy x=-6/25

\(-5\left(2-\chi\right)+4\left(\chi-3\right)=10\chi-15\)

\(\Rightarrow-10+5\chi+4\chi-12=10\chi-15\)

\(\Rightarrow-10-12+15=10\chi-5\chi-4\chi\)

\(\Rightarrow\chi=-7\)

HTDT

bn lm câu 2 hộ mk

Xin lỗi ko đúng bài gòi 😔😔