Step-by-step explanation:
As shown in the picture, 3(x + 7) = (x + 7) + (2x - 7) + x.
So 3x + 21 = 4x. This means that x = 21.
Answer:
225 feet below sea level, 18 feet above sea level.
Step-by-step explanation:
Negative represents below, if the 0 is sea level, and positive represents above.
Answer:
10 +11f
Step-by-step explanation:
3(4 + 2f) + 5f - 2 =
12 + 6f + 5f - 2 =
10 +11f
Answer:
28j + 21
Step-by-step explanation:
combine like terms
7(2j+ 3+ 2j)
7(4j+3)
Distribute
7(4j + 3)
=
28j + 21
