Question

rezolvati in multimea Q ecuatia si efectuati verificarea:0,47x-0,14x=1,65; (4x-1)/3=- 1 treime; 7 noimi x-2treimi x=2; -3*(2-15x)=-6

Answer 1

0,47x - 0,14x = 1,65 => 0,33x = 1,65 => 33/99x=1 intreg si 65/99 => 33/99x=164/99 ( (99+65)/99) => x=164/99 / 33/99 => x=164/99 * 99/33 => x=164/33

(4x-1)/3=-1/3 => 4x-1 = -1 => 4x=0 => x=0

7/9x - 2/3x = 2 => 7/9x - 6/9x=2 => 1/9x=2 => x/9 = 2 => x=9*2 => x=18

-3*(2-15x)=-6 => 2-15x = 2 => 15x=0 => x=0