Question

alguien ayúdeme xf ​

Answer 1

Explicación:

A)

$8x + 3 = 19 \\ 8x = 16 \\ x = 2 \\ comprobacion \\ 8(2) + 3 = 19 \\ 16 + 3 = 19 \\ 19 = 19$

B)

$3x + 5 = - 4 \\ 3x = - 9 \\ x = - 3 \\ comprobacion \\ 3( - 3) + 5 = - 4 \\ - 6 + 5 = - 4 \\ - 4 = - 4$

C)

$2x + 3 = 4x + 4 \\ 2x - 4x = 4 - 3 \\ - 2x = 1 \\ = \frac{ - 1}{2} \\ comprobacion \\ 2( \frac{ - 1}{2} ) + 3 = 4( \frac{ - 1}{2} ) + 4 \\ \frac{ - 2}{2} + 3 = \frac{ - 4}{2} + 4 \\ - 1 + 3 = -2 + 4 \\ 2 = 2$