Question

2.What values of z will make this expression true? 15-z = z-15

a]20
b]10
c]15
d]-10
2.solve (x-`1)/2 - (x-2)/3 = (x-4)/7
1)x=16
2)x=12
3)x=-16
4)x=-17

Answer 1

Step-by-step explanation:

15-z = z-15

15+15 = z+z

2z = 30

z = 30/2 = 15 (c)

(x-`1)/2 - (x-2)/3 = (x-4)/7

3x-3 - 2x-2 /6 = x-4 /7

x-6 /6 = x-4/7

7x-42 = 6x-24

7x-6x = -24+42

x = 18