Question

Resolva as seguintes questoes

5/x- 2 = 1/4 (x ≠ 0)

3bx + 6bc = 7bx + 3bc

Answer 1

$\frac{5}{x} - 2 = \frac{1}{4} \\ \frac{20}{4x} - \frac{8x}{4x} = \frac{x}{4x} \\ 20 - 8x = x \\ - 8x - x = - 20 \\ - 9x = - 20 \\ 9x = 20 \\ x = \frac{20}{9} \\ \\ 3bx + 6bc = 7bx + 3bc \\ 3bx - 7bx = 3bc - 6bc \\ - 4bx = - 3bc \\ b( - 4x) = b( - 3c) \\ - 4x = - 3c \\ 4x = 3c \\ 4( \frac{20}{9} ) = 3c \\ \frac{80}{9} = 3c \\ 80 = 27c \\ c = \frac{80}{27}$