Question

Ayúdenme por favor, es para hoy antes de las 4 pm

Answer 1

a)

$8(2x + 3) = 30 \\ 8 \times 2x + 8 \times 3 = 30 \\ 16x + 24 = 30 \\ 16x = 30 - 24 \\ 16x = 6 \\ x = \frac{6}{16} \\ x = \frac{3}{8}$

b)

$7x - 8 = 12 - 3 \\ 7x - 8 = 9 \\ 7x = 9 + 8 \\ 7x = 17 \\ x = \frac{7}{17}$

c)

$4(3x - 1) = 21 \\ 4 \times 3x - 4 \times 1 = 21 \\ 12x - 4 = 21 \\ 12x = 21 + 4 \\ 12x = 25 \\ x = \frac{12}{25}$

d)

$5(x - 3) = 2(3x) \\ 5 \times x - 5 \times 3 = 6x \\ 5x - 15 = 6x \\ 5x - 6x = 15 \\ - x = 15 \\ x = - 15$

e)

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

f)

$4(x - 3) = 20 \\ x - 3 = \frac{20}{4} \\ x - 3 = 5 \\ x = 5 + 3 \\ x = 8$

g)

$6(2x - 1) = 42 \\ 2x - 1 = \frac{42}{6} \\ 2x - 1 = 7 \\ 2x = 7 + 1 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

h)

$3(2x - 4) = 25 \\ 3 \times 2x - 3 \times 4 = 25 \\ 6x - 12 = 25 \\ 6x = 25 + 12 \\ 6x = 37 \\ x = \frac{37}{6}$