There's nothing to substitute, and no solution,
until somebody gives you another equation.
Answer:
Step-by-step explanation:
n/3 - 2 = 4 Add 2 to both sides
n/3 - 2 + 2 = 4+2 Combine
n/3 = 6 Multiply both sides by 3
3*n/3 = 6 * 3
n = 18
Answer:
v=18
u=4
Step-by-step explanation:
v/3=6
v=18
2u+2=5u-10
3u=12
u=4
Answer:
D
Step-by-step explanation:
The area (A) of an equilateral triangle is calculated as
A =
← s is length of a side
Here s = 12, thus
A = 
= 
= 36
→ D