Question

Resolva
a) 3X=15
b) 5/x=-30
C) - 5X=25
dl-2x+5x=20​

Answer 1

a)

$3x = 15 \\ x = \frac{15}{3} \\ x = 5$

b)

$\frac{5}{x} = - 30 \\ 5 = - 30 \times x \\ \frac{5}{ - 30} = x \\ \times = - 0.166$

c)

$- 5x = 25 \\ x = \frac{25}{ - 5} \\ x = - 5$

d)

$- 2x + 5x = 20 \\ 3x = 20 \\ x = \frac{20}{3} \\ x = 6.66$