Question

Por favor me ajudem!
Resolva as equações:

a) 4x + 10 = x – 5

b) 5x – 4 + 2x = 10

c) 6x – 24 = 0

d)2x – 10 = x + 8

e)4x – 5 = 15

f)2x + 12 = 20

g)5x = 30

Answer 1

Explicação passo-a-passo:

$a)4x + 10 = x - 5 \\ 4x - x = - 5 - 10 \\ 3x = - 15 \\ x = \frac{ - 15}{3} = - 5$

$b)5x - 4 + 2x = 10 \\ 7x = 10 + 4 \\ 7x = 14 \\ x = \frac{14}{7} = 2$

$c)6x - 24 = 0 \\ 6x = 24 \\ x = \frac{24}{6} = 4$

$d)2x - 10 = x + 8 \\ 2x - x = 8 + 10 \\ x = 18$

$e)4x - 5 = 15 \\ 4x = 15 + 5 \\ 4x = 20 \\ x = \frac{20}{4} = 5$

$f)2x + 12 = 20 \\ 2x = 20 - 12 \\ \\ 2x = 8 \\ x = \frac{8}{2} = 4$

$g)5x = 30 \\ x = \frac{30}{5} = 6$