Question

ayuda son 4 ecuaciones
–18 + a = –10 – a


27x – 10 = 12x + 8x + 4


4x – 2 + 2x = 8x – 10}



5a – 1 = 14 – 6

Answer 1

Explicación paso a paso:

$–18 + a = –10 – a \\ a + a = - 10 + 18 \\ 2a = 8 \\ a = \frac{8}{2} \\ a = 4$

$27x – 10 = 12x + 8x + 4 \\ 27x - 10 = 20x + 4 \\ 27x - 20x = 4 + 10 \\ 7x = 14 \\ x = \frac{14}{7} \\ x = 2$

$4x – 2 + 2x = 8x – 10 \\ 6x - 2 = 8x - 10 \\ - 2 + 10 = 8x - 6x \\ 8 = 2x \\ \frac{8}{2} = x \\ 4 = x$

$5a – 1 = 14 – 6 \\5a - 1 =8 \\ 5a = 8 + 1 \\ 5a = 9 \\ a = \frac{9}{5}$