Question

Solve this inequality. Check your solution.
d + 5 < 7

Answer 1

d+5<7
d<7-5
d<2
This is your answer.

Answer 2

d + 5 < 7
d < 7 - 5
d < 2 <=== solution ......do d  (is less then) 2

check...
lets let d = 1                lets let d = 0
d + 5 < 7                      d + 5 < 7
1 + 5 < 7                      0 + 5 < 7
6 < 7......true                5 < 7....true