Question

alguien me puede ayudar por favor es para mañana ​

Answer 1

$1) \frac{3x}{4} + 10 = 16 \\ 4( \frac{3x}{4} + 10 ) = 4 \times 16 \\ 3x + 40 = 64 \\ 3x = 64 - 40 \\ 3x = 24 \\ x = 8$

$2) \frac{2x}{5} - 6 = 4 \\ 5( \frac{2x}{5} - 6) = 5 \times 4 \\ 2x - 30 = 20 \\ 2x = 20 + 30 \\ 2x = 50 \\ x = 25$

$3) \frac{3y}{4} + 9 = 15 \\ 4( \frac{3y}{4} + 9 ) = 4 \times 15 \\ 3y + 36 = 60 \\ 3y = 60 - 36 \\ 3y = 24 \\ y = 8$

$4) \frac{2x - 8}{3} = 4 \\ 3 \times \frac{2x - 8}{3} = 3 \times 4 \\ 2x - 8 = 12 \\ 2x = 12 + 8 \\ 2x = 20 \\ x = 10$

$5)28x + 28(x + 7) = 1484 \\ 28x + 28x + 196 = 1484 \\ 56x + 196 = 1484 \\ 56x = 1484 - 196 \\ 56x = 1288 \\ x = 23$

$6)3(z - 1) - 20 = 7 \\ 3z - 3 - 20 = 7 \\ 3z - 23 = 7 \\ 3z = 7 + 23 \\ 3z = 30 \\ z = 10$

$7)2(y + 4) - 14 = y - 1 \\ 2y + 8 - 14 = y - 1 \\ 2y - 6 = y - 1 \\ 2y - y = - 1 + 6 \\ y = 5$

$8)2(x + 3) + 5 = 19 \\ 2x + 6 + 5 = 19 \\ 2x + 11 = 19 \\ 2x = 19 - 11 \\ 2x = 8 \\ x = 4$

$9)4(x - 5) - 12 = 3(x - 9) \\ 4x - 20 - 12 = 3x - 27 \\ 4x - 32 = 3x - 27 \\ 4x - 3x = - 27 + 32 \\ x = 5$

$10) \frac{2x}{5} + 17 = 31 \\ \frac{2x}{5} = 31 - 17 \\ \frac{2x}{5} = 14 \\ 5 \times \frac{2x}{5} = 5 \times 14 \\ 2x = 70 \\ x = 35$