Answer:
5
Step-by-step explanation:
The opposite of a number is just the number on the opposite side of zero on the number line. The opposite of a is -a. The opposite of -a is a. The opposite of 5 is -5.
a 7
because 4a + 7 - 7 35 - 7
equals 4a 28
and 4a/4 28/4
equals a 7
3
