Answer:
x+3 = x+3
Step-by-step explanation:
No matter what you plug into x, both sides will be the same.
Yes that is true if you think of it as a point and the lines extending in both directions.
Answer:
21=x ( alternate angles are equal)
Answer:
1)49
2)231
Step-by-step explanation:
1)
4+9=13
4*2=8
8+1=9
2)
2+3+1=6
2+1=3
1*2=2