Question

Resolva as equações a seguir.
a) -12 = -5s + 3
b) x/7 - 5/7 = 1/7
c) 2x/3 + x/2 - 5/4 = 0
d) t + 2/3 - t + 3/2 = 1
(Essas / que eu coloquei são fração)

Answer 1

$a) - 12 = - 5s + 3 \\ 5s = 3 + 12 \\ 5s = 15 \\ s = \frac{15}{5} \\ s = 3$

$b) \frac{x}{7} - \frac{5}{7} = \frac{1}{7} \\ \frac{x}{7} = \frac{1}{7} + \frac{5}{7} \\ \frac{x}{7} = \frac{6}{7} \\ x = 6$

$c) \frac{2x}{3} + \frac{x}{2} - \frac{5}{4} = 0 \\ \frac{7}{6} x - \frac{5}{4} = 0 \\ \frac{7}{6} x = \frac{5}{4} \\ x = \frac{15}{14} \\ 14x15$

$d)t + \frac{2}{3} - t + \frac{3}{2} = 1 \\ \frac{2}{3} + \frac{3}{2} = 1 \\ \frac{13}{6} = 1 \\ 13 = 6$