Tìm x :

a) \(a\dfrac{1}{2}x+\dfrac{3}{5}x=\dfrac{-22}{25}\)

\(\dfrac{6}{7}x-\dfrac{1}{2}x=\dfrac{15}{28}\)

\(4x\cdot\left(x+\dfrac{3}{5}\right)=0\)

\(\left(\dfrac{5}{8}+x\right)\left(3x-\dfrac{6}{11}\right)=0\)

( x + 4 ) . ( y -1 ) = 13

xy - 3x + y = 20

(x - 1 ) . ( x +2) . (-x - 3) = 0

Tìm các số nguyên x , thỏa mãn :

( x - 7 ) ( x + 3 ) < 0

x . (x+7) = 0

(x+12) . (x-3) = 0

(-x + 5 ). ( 3 - x) = 0

(x - 1 ) . ( x +2) . (-3 - 3) = 0