Question

equaçao de primeiro grau​

Answer 1

Resposta:

Olá bom dia!

a.

x - 7 = 0

x = 7

S = {7}

b.

x - $\frac{3}{8}$ = 0

8x -3 = 0

8x = 3

x = $+\frac{3}{8}$

S = {$+\frac{3}{8}$}

c.

-2x = -16

x = $\frac{-16}{-2}$

x = +8

S = {+8}

d.

7x = 4x - 5

7x - 4x = -5

3x = -5

x = $-\frac{5}{3}$

S = $-\frac{5}{3}$

e.

9x - 7 = 5x + 13

9x - 5x = 13 + 7

4x = 20

x = $\frac{20}{4}$

x = 5

S = {5}

f.

$\frac{x}{1} +\frac{1}{3} =\frac{2}{3}$

x = $\frac{2}{3} -\frac{1}{3}$

x = $\frac{1}{3}$

S = { $\frac{1}{3}$ }