Question

Rezolvati in multimea Q ecuatia: IN TOATE CAZURILE X-URILE SUNT NECUNOSCUTE! Dau coroana

Answer 1

$\frac{2}{3} x=46 / *\frac{3}{2} \\\frac{3}{2}*\frac{2}{3}x = \frac{3}{2}46\\ x = 3*23 = 69$

$\frac{1}{5} x*1,3=1\\\frac{1}{5}x *\frac{13}{10} = 1\\\frac{13}{50} x = 1\\x = \frac{50}{13}$

$3,6:x = 1,2\\\frac{18}{5} *\frac{1}{x} = 1,2\\\frac{18}{5x} = 1,2\\18 = 6x\\x = 3$

$1-\frac{1}{5}x = \frac{1}{2} / *10\\ 10-2x = 5\\-2x = -5\\x = 5/2$

5-2x = -2,6

-2x = -2,6-5

-2x = -7,6

x = 3,8