Question

Me ajudem por favorrrr

Answer 1

A) 5x + 18 = 33

5x = 33-18

5x = 15

x = 15/5

x = 3

B)

$\frac{3n}{9} - 5 = 0$

3n = 0 + 5 · 9

3n = 0 + 45

3n = 45

n = 45/3

n = 15

C) 7x - 24 = 3x + 20

7x - 3x = 20 + 24

4x = 44

x = 44/4

x = 11

D) 8x - 43 = 65

8x = 65 + 43

8x = 108

x = 108/8

x =

$\frac{108 ^{ \div 2} }{8 ^{ \div 2} } = \frac{54 ^{ \div 2} }{4 ^{ \div 2} } = \frac{27}{2} \: ou \: 13.5$

E) 23x - 16 = 14 - 17x

23x + 17x = 14 + 16

40x = 30

x = 30/40

x =

$\frac{30}{40} = \frac{3}{4} \: ou \: 0.75$