Question

resolva as equações:
a) 2y /5 - y - 2/3 = 1/2
b) x/2 - y - 2/3 = 2x

Answer 1

2y/5 - y - 2y/ 3 = 1/2
2y/30 - y/30 - 2y/30 = 1/30
12y/30 - 30y/30 - 20/30 = 15/30
12y - 30y - 20 = 15 + 20
- 18y = 35( - 1 )
y= - 35/18

b) x/2 - y - 2/3 = 2x
x /6 - y/6 - 2/6 = 2x/6
3x/6 - 6y/6 -4/6 = 12x /6
3x - 6y - 4 = 12x
3x - 12x - 6y = 4
-8x - 6y = 4 ( - 1 )
8x + 6y - 4