Question

as equações q b c d e

Answer 1

a)x/1 - x/2 = 1/1 m.m.c =2
2 x/2 - x/2 = 2/2 cortar o denominador
2 x - x = 2
x = 2

b)x/3 + x/2 = 15 m.m.c =6
2 x/6 + 3 x/6  = 90/6 cortar o denominador
2 x + 3 x = 90
5 x = 90
x = 90/5
x = 18

c)3 x/2 - 5 x /1 = -7/1   m.m.c =2
3 x /2 - 10 x/2 = -14/2   cortar o denominador
3 x - 10 x = -14
-7 x = -14
x = -14/-7
x = 2

d)x/2 + x/4 + x/2 = 4/1  m.m.c = 4
2 x/4 + x/4 + 2 x/4 =16
cortar o denominador
2 x + x + 2 x = 16
5  x = 16
x = 16/5

e)3 x/4  -  1 x/2 = -2/1  m.m.c = 4
3 x /4 - 2 x /4 = -8/4 cortar o denominador
3 x - 2 x = -8
x = -8