Question

me ajudem por favooor!!!!- urgente

Answer 1

A)

$2x - 3 = 15 \\ 2x = 15 + 3 \\ 2x = 18 \\ x = \frac{18}{2} \\ x = 9$

B)

$4y = 30 - 18 \\ 4y = 12 \\ y = \frac{12}{4} \\ y = 3$

C)

$m + 4 = 20 \\ m = 20 - 4 \\ m = 16$

D)

$x + 5 = 10 \\ x = 10 - 5 \\ x = 5$

E)

$2x - 4 = 12 \\ 2 \times = 12 + 4 \\ 2x = 16 \\ x = \frac{16}{2} \\ x = 8$

F)

$y + 8 = - 5 \\ y = - 5 - 8 \\ y = - 13$

G)

$x + 17 = 10 \\ x = 10 - 17 \\ x = - 7$

H)

$x - 3 = 10 \\ x = 10 + 3 \\ x = 13$

I)

$x - 15 = 25 \\ x = 25 + 15 \\ x = 40$

J)

$5x - 4 = 10 \\ 5x = 10 + 4 \\ 5x = 14 \\ x = \frac{14}{5}$

K)

$10 + 8 = 9 + 5x \\ 18 = 9 + 5x \\ 18 - 9 = 5x \\ 9 = 5x \\ \frac{9}{5} = x$

L)

$4x - 8 = 20 \\ 4x = 20 + 8 \\ 4x = 28 \\ x = \frac{28}{4} \\ x = 7$

M)

$3x = 9 \\ x = \frac{9}{3} \\ x = 3$

N)

$5y = 30 \\ y = \frac{30}{5} \\ y = 6$

O)

$6x = 5 \\ x = \frac{5}{6}$

P)

$4y = - 24 \\ y = \frac{ - 24}{4} \\ y = - 6$

Q)

$7m = - 28 \\ m = \frac{ - 28}{7} \\ m = - 4$

R)

${( - y = - 20)}^{( - 1) } = \\ y = 20$

S)

$7 = x + 1 \\ 7 - 1 = \\ 6 = x$

T)

$9 + 5y = - 91 \\ 5y = - 91 - 9 \\ 5y = - 100 \\ y = \frac{ - 100}{5} \\ y = - 20$

U)

$8a = 100 \\ a = \frac{100}{8} \\ a = \frac{50}{4} = \frac{25}{2}$