Question

resolva as equações: a)x/3=7. b)x/4=-3. c)2x/5=4. d)2x/3=-10. e)3x/4=30. f)2x/5=-18

Answer 1

a)x=7 ==> x = 21
   3

b)x=-3 ==> x = - 12
   4

c)2x=4 ==> 2x = 20 ==> x= 10
    5

d)2x = -10 ==> 2x = - 30 ==> x = - 15
    3

e)3x=30 ==> 3x = 120 ==> x = 40
    4

f)2x= - 18 ==> 2x = - 90 ==> x = - 45
   5