x = a number
7 + 2x = 21
Subtract 7 from both sides
2x = 14
Divide both sides by 2
x = 7
7 is the only number that makes this sentence true.
Answer:
25 feet from the surface
Step-by-step explanation:
10+15
on a horizontal number line . numbers to the left are less than numbers to the right .. numbers to the right are less than numbers to the left
9.945*10^30 Kg - 1.7901*10^32 Kg
This is on average what the mass of a black hole.