Question

5) Resolva as equações a seguir: a)18x - 43 = 65 b) 23x - 16 = 14 - 17x c) 10y - 5 (1 + y) = 3 (2y - 2) - 20

Answer 1

Resposta:

$a) 18x = 65 - 43\\x = \frac{22}{18}:2 = \frac{11}{9} \\\\b) 23x - 17x = 14 +16 \\6x = 30\\x= \frac{30}{6} = x = 5\\\\c) 10y - 5 -5y = 6y - 6\\10y-5y - 6y = -6 +5\\-y = -1 (-1)\\y = 1$