Question

me ajudem por favor​

Answer 1

a)

$20x - 4 = 5x \\ 20x - 5x = + 5 \\ 15x = + 5 \\ x = \frac{5}{15} \\ x = 0.33...$

b)

$4x = - 8x + 36 \\ 4x + 8x = + 36 \\ 12x = 36 \\ x = \frac{36}{12} \\ x = 3$

c)

$x - 3 = 5 \\ x = 5 + 3 \\ x = 8$

d)

$15 = x + 1 \\ 15 - 1 = x \\ 14 = x$