a)
[tex]x = \frac{3y - 5}{2} [/tex]
[tex]x = \frac{ - 13 - y}{3} [/tex]
[tex] \frac{3y - 5}{2} = \frac{ - 13 - y}{3} [/tex]
[tex]9y - 15 = - 26 - 2y[/tex]
[tex]11y = - 11[/tex]
[tex]y = - 1[/tex]
[tex]x = - 4[/tex]
b)
[tex]x = (2 - \frac{y}{4} ) \times 3[/tex]
[tex]x = \frac{8 - y}{4} \times 3 = \frac{24 - 3y}{4} [/tex]
[tex]x = y - 1[/tex]
[tex]24 - 3y = y - 1[/tex]
[tex]4y = 25 = > y = 6.25[/tex]
[tex]x = 5.25[/tex]
c)
[tex]2x + 2(y - 1) - y = - 3 = > 2x = - 3 - 2(y - 1) + y = > x = \frac{ - 3 - 2(y - 1) +y}{2} [/tex]
[tex]3x - 4y = - 3x[/tex]
[tex]6x = 4y = > x = \frac{2y}{3} [/tex]
[tex] - 9 - 6y + 6 + 3y = 4y[/tex]
[tex] - 3 - 3y = 4y[/tex]
[tex]7y = - 3[/tex]
[tex]y = - 0.(428571)[/tex]
[tex]x = - 0.(285714)[/tex]
COROANA?
