Question

C1:

a)x+3/5=-1/15

b)x/14=1/7-3/4

c)-1/2x+1/5=3/10

d)4/5-(2/15+x)=1/15

Answer 1

a) x + 3/5 = -1/15

=> x = -1/15 - 3/5

=> x = -2/3

b) x/14 = 1/7 - 3/4

=> x/14 = -17/28

=> 2x/28 = -17/28

=> 2x = -17

=> x = -17/2

Answer 2

c) -1/2x + 1/5 = 3/10

=> -1/2x = 3/10 - 1/5

=> -1/2x = 1/10

=> x = 1/10 : (-1/2)

=> x = -1/5

d) 4/5 - (2/15 + x) = 1/15

=> 4/5 - 2/15 - x = 1/15

=> 2/3 - x = 1/15

=> x = 2/3 - 1/15

=> x = 3/5

Answer 3

a) x= -1/15-3/5=-10/15

b) x/14=1/7-3/4 = -17/28 =x/14 > -17*14 = x*28 = -238 >x=-238/28=-8.5

Answer 4

a)x+3/5=-1/15

  x=-1/15-3/5

  x=-2/3

b)x/14=1/7-3/4

   x/14=17/28

=>x.2/28=17/28

=>x.2=17

=>x=8,5

c)-1/2x+1/5=3/10

  -1/2x=3/10-1/5

  -1/2x=1/10

  x=1/10:(-1/2)

 x=-1/5

d)4/5-(2/15+x)=1/15

2/15+x=11/15

x=11/15-2/15

x=3/5