Verified answer

bonsoir;

a)

2x= 13-1

2x = 12

x= 12/2

x= 6

b)

3x = 20-14

3x = 6

x= 6/3

x=2

c)

14x/7 +1/7 = 7/7

14x/7 = 7/7-1/7

14x/7 = 6/7

14x = 6/7*7

14x = 42/7

14x = 6

x = 6/14

x= 3/7

d)

3x-2x = 10+5

x = 15

e)

10x-7x = -1-3

3x = -4

x = -4/3

f)

-16 = 8x-3x

-16 = 5x

x= -16/5