Question

Giải giúp với ạ cần gấp mình cảm ơn ạ

Answer 1

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

<=> \(\dfrac{-18}{12}+\dfrac{12x}{12}-\dfrac{15}{12}=\dfrac{-4}{12}-\dfrac{24x}{12}\)

<=> -18 + 12x - 15 = -4 - 24x

<=> 12x + 24x = 18 + 15 - 4

<=> 36x = 29

<=> x = \(\dfrac{29}{36}\)

6. \(\dfrac{3}{4}x-\dfrac{3}{2}=\dfrac{5}{6}+\dfrac{3}{8}x\)

<=> \(\dfrac{18x}{24}-\dfrac{36}{24}=\dfrac{20}{24}+\dfrac{9x}{24}\)

<=> 18x - 36 = 20 + 9x

<=> 18x - 9x = 20 + 36

<=> 9x = 56

<=> x = \(\dfrac{56}{9}\)

7. \(3-\left(\dfrac{1}{2}+2x\right)=\dfrac{2}{3}-x\)

<=> \(3-\dfrac{1}{2}-2x=\dfrac{2}{3}-x\)

<=> \(\dfrac{18}{6}-\dfrac{3}{6}-\dfrac{12x}{6}=\dfrac{4}{6}-\dfrac{6x}{6}\)

<=> 18 - 3 - 12x = 4 - 6x

<=> 15 - 4 = 12x - 6x

<=> 11 = 6x

<=> x = \(\dfrac{11}{6}\)