Question

me pueden ayudar porfa

doy corona

Answer 1

Respuesta:

$3x - 8 = x + 4 \\ 3x - x = 4 + 8 \\ 2x = 12 \\ x = \frac{12}{2} \\ x = 6 \\ comprobación \\ 3x - 8 = x + 4 \\ 3(6) - 8 = 6 + 4 \\ 18 - 8 = 10 \\ 10 = 10$

$4x + 20 = 45 - x \\ 4x + x = 45 - 20 \\ 5x = 25 \\ x = \frac{25}{5} \\ x = 5 \\ comprobación \\ 4x + 20 = 45 - x \\ 4(5) + 20 = 45 - 5 \\ 20 + 20 = 40 \\ 40 = 40$

$3m - \frac{1}{2} = 2m + \frac{1}{3} \\ 3m - 2m = \frac{1}{3} + \frac{1}{2} \\ m = \frac{2(1) + 3(1)}{6} \\ m = \frac{5}{6} \\ comprobación \\ 3m - \frac{1}{2} = 2m + \frac{1}{3} \\ 3( \frac{5}{6} ) - \frac{1}{2} = 2( \frac{5}{6} ) + \frac{1}{3} \\ \frac{15}{6} - \frac{1}{2} = \frac{10}{6} + \frac{1}{3} \\ \frac{15 - 3(1)}{6} = \frac{10 + 2(1)}{6} \\ \frac{12}{6} = \frac{12}{6} \\ 2 = 2$