Question

ajuda aí família, por favor.​

Answer 1

a) x + 25 = 35, x = 35 - 25, x = 10

b) x - 40 = -47, x = (-47) + 40, x = -7

c) 7x = 77, x = 77 ÷ 7, x = 11

d) x/22 = 5, x = 5 x 22, x = 110

e) x + 1/3 = 7, x = 7 - 1/3, x = 6/3, x = 2

f) x - 22 = -4, x = (-4) + 22, x = 18

g) 5x = -20, x = (-20) ÷ 5, x = -4

h) x/4 = -4, x = -4 x 4, x = -16

i) x + 37 = 10, x = 10 - 37, x= -27

j) x - 3/5 = -1, x = -1 + 3/5, x = 2/5

$k) \: 3 x + \frac{2}{7} = \frac{1}{2}$

$3x = \frac{1}{2} - \frac{2}{7}$

$3x = \frac{(14 \div 7 \times 2) - (14 \div 2 \times 1)}{14}$

$3x = \frac{1 - 7}{14} ( - 7 \div 7) \: (14 \div 7)$

$3x = \frac{1 - ( - 1)}{2}$

$3x = \frac{2}{2} = 1$

$x = \frac{1}{3}$