7(2/7x-3/14) - 4(7/2x-3/8y) = если х=5/6, y=1

Question

7(2/7x-3/14) - 4(7/2x-3/8y) = если х=5/6, y=1

Answer 1

= 2X - 1,5Y - 14X + 1,5Y = - 12X 
X = 5/6 
- 12 * 5/6 = - 10 
 ОТВЕТ ( - 10 )