Question

Resolva as Equações: (FOTO)

Answer 1

Resposta:

a. $x + 8 = 10\\x = 10 - 8\\x = 2$

b. $x - 47 = 30 \\x = 30 + 47\\x = 77.$

c. $3x + 12 = x - 8\\3x - x = - 8 - 12\\2x = -20\\x = -10.$

d. $5x - 3 = 2x\\5x - 2x = 3\\3x = 3\\x = 1.$

e. $2(3x - 4) = 2(x + 3)\\6x - 8 = 2x + 6\\6x - 2x = 6 + 8\\4x = 14\\x =\frac{14}{4} \\\\x = \frac{7}{2}$

f. $\frac{x}{5} - 2 = \frac{1}{4}\\ \\\frac{x}{5} - 2 = 1\\\\x - 10 = 5\\x = 5 + 10\\x = 15.$