Question

02. Resolva as equações a seguir, encontrando o valor de x.
a) 2x-34=50 *
b) 50-2x=34 *
c) 34+x/2=50 *
d) x+x/2+34=-50 *
Respondam por favor.

Answer 1

Resposta:

a) x = 42

b) x = 8

c) x = 32

d) x = -900

Explicação passo-a-passo:

a)

$2x - 34 = 50\\2x = 50 + 34\\2x = 84\\x = \frac{84}{2} \\x = 42$

b)

$50 - 2x = 34\\-2x = 34 - 50\\-2x = -16\\x = \frac{-16}{-2} \\x = 8$

c)

$34 + \frac{x}{2} = 50\\2*(34 + \frac{x}{2}) = 2 * 50\\2*34+2*\frac{x}{2} = 100\\68 + x = 100\\x = 100 - 68\\x = 32$

d)

$\frac{x+x}{2 + 34} =-50\\\frac{2x}{36} = -50\\\frac{x}{18} = -50\\x = (-50) * 18\\x = -900$