Question

Verify by substitution that
(i) the root of 3x - 5 = 7 is x = 4
(iii) the root of 5x - 8 = 2x - 2 is
Z
(v) the root of
8 is z = 56
7​

Answer 1

Answer:

1) 3x-5=7 , x=4

3×4-5=7

12-5=7

7=7

VERIFIED

3) 5x-8=2x-2

5x-2x=-2+8

3x=6

x=2

CHECK:

5×2-8=2×2-2

10-8=4-2

2=2

VERIFIED

5) Ugh., don't know this one.