Question

.d)
$5(x + 3) = 2(x - 1)$
$e) \\ \\ 3x + \frac{1}{4} = \frac{2}{5}$

Answer 1

$d) \\ 5(x+3)=2(x-1) \\ 5x+15=2x-2 \\ 5x-2x=-2-15 \\ 3x=-17 \\ \\ x=- \frac{17}{3} \\ \\ S=\{- \frac{17}{3} \}$ 

$f) \\ 3x+ \frac{1}{4} = \frac{2}{5} \\ \\ mmc(4,5)=20 \\ \\ 60x+5=8 \\ \\ 60x=8-5 \\ \\ 60x=3 \\ \\ x= \frac{3}{60} = \frac{1}{20} \\ \\ S=\{ \frac{1}{20} \}$