Question

10x+2².5=10²

Answer 1

`10x + 20 = 10^2`

`10x = 80`

`x = 8`

Answer 2

10x+4.5=100

10x=100-20

10x=80

x=8

Answer 3

10x + 2². 5 = 10² = 100

2². 5 = 4 . 5 = 20

10x = 100 - 20  = 80

x = 80 : 10 = 8