PEP fifth grade volume I mathematics exercise 12 question 11 answer

PEP fifth grade volume I mathematics exercise 12 question 11 answer

When equal to 0
(36-4a)/8=0
(36-4a)/8x8=0x8
36-4a=0
4a=36-0
4a=36
4a/4=36/4
a=9
When equal to 1
(36-4a)/8=1
(36-4a)/8x8=1x8
36-4a=8
4a/4=8/4
a=2