2x+1/2 - 3/4 = 7x/8 2x - 12 = 1/4 (3x+2) 1/2 (5x+2) = 7/2 (x-6)

Решите задачу:

$2x+ \frac{1}{2} - \frac{3}{4} = \frac{7x}{8}; \\ \frac{16x}{8} + \frac{4}{8} - \frac{6}{8} = \frac{7x}{8}; \\ 16-7x=-4+6; \\ 9x=2; \ x= \frac{2}{9}$

$2x-12= \frac{1}{4}(3x+2); \\ 2x-12=0,75x+0,5; \\ 2x-0,75=12+0,5; \\ 1,25=12,5; \ x=10$

$\frac{1}{2} (5x+2) = \frac{7}{2} (x-6); \\ 2,5x+1=3,5x-21 \\ 2,5x-3,5x=-21-1; \\ -x=-22; \ x=22$