Question

ecuaciones de primer grado :ayudenme porfa doy coronita ​

Answer 1

PROBLEMA 1

$2x + 3x + 5 = 65 \\ 5x + 5 = 65 \\ 5x = 65 - 5 \\ 5x = 60 \\ x = \frac{60}{5} \\ x = 12$

PROBLEMA 2

$15 - a + 4a = - 6 \\ 15 + 3a = - 6 \\ 3a = - 6 - 15 \\ 3a = - 21 \\ a = \frac{ - 21}{3} \\ a = - 7$

PROBLEMA 3

$4x + 6 = - x - 14 \\ 4x + x = - 14 - 6 \\ 5x = - 20 \\ x = \frac{ - 20}{5} \\ x = - 4$