Question

resolva as equações

a)3x-6=2x-4


b)3x+4=2x+2


c)3x-2-7=15


d)7y-28=2y-3


e)3y-6=12-4y

me ajudem

Answer 1

Oi! tudo bem?

a)
$3x - 6 = 2x - 4$
$3x - 2x = - 4 + 6$
$\boxed{x = 2}$

b)
$3x + 4 = 2x + 2$
$3x - 2x = 2 - 4$ $\boxed{x = - 2}$

c)
$3x - 2 - 7 = 15$
$3x - 9 = 15$
$3x = 15 + 9$
$3x + 24$
$x = \frac{24}{3}$
$\boxed{x = 8}$

d)
$7y - 28 = 2y - 3$
$7y - 2y = - 3 + 28$
$5y = 25$
$x = \frac{25}{5}$
$\boxed{x = 5}$

e)
$3y - 6 = 12 - 4y$
$3y + 4y = 12 + 6$
$7y = 18$
$\boxed{x = \frac{18}{7}}$