I think it's a3D unless u tell me what u mean by finding S12
Answer
16=3x
Step-by-step explanation:
Each side has x
there is 3 sides
so 3x will equal 16.
Hope this helped!
Complete question:
what is the answer to 22 +10x = 0
Answer:
the value of x is -2.2
Step-by-step explanation:
Given;
22 +10x = 0
collect like terms
10x = 0 - 22
10x = -22
divide both sides by 10

Therefore, the value of x is -2.2
Answer:
y=4
Step-by-step explanation:
Only the third one makes x=-1 true