Question

Determine a raiz das equações a seguir :

Answer 1

a)
$\frac{x}{2} +1=5$

$\frac{x}{2} =1+5$

$\frac{x}{2} =6$

x = 2 . 6

x = 12

b)
$\frac{a}{3} = \frac{-2a}{5}$

3 . (-2a) = 5a

-6a -5a = 0 (-1)

6a + 5a = 0

11a = 0

$a= \frac{0}{5}$

a = 0

c)
$\frac{y}{3} - \frac{y}{2} =y-1$

mmc = 6

$\frac{2y-3y}{6} = y - 1$

$\frac{-y}{6} = y-1$

-y = 6.(y-1)

-y = 6y - 6

-y - 6y = -6 (-1)

y + 6y = 6

7y = 6

$y= \frac{6}{7}$