Question

X−7<14 Options: x<7 x>21 x<21 x>7

Answer 1

This is a simple equation:

x - 7 < 14

x < 14 + 7

x < 21

→ Many people think that because there is not "=" sign they don't flip the sign of what in this case is -7. But actually, the symbols "<" and ">" act as the equal sign. This rule doesn't apply to positive number, only negative.

Hope it helped,

BioTeacher101

(If you have any questions, feel free to ask them in the comments)

Answer 2

x - 7 < 14

To solve, you must isolate the x. Add 7 to both sides

x - 7 (+7) < 14 (+7)

x < 14 + 7

x < 21

x<21, or (C) is your answer

Note: You only flip the signs if you are multiplying or dividing by a negative number

hope this helps