Try this option:
x²+27=0;
Answer:
12 bikes
9 tricycles
Step-by-step explanation:
x+y=21
2x+3y=51
x=-y+21
2(-y+21)+3y=51
-2y+42+3y=51
y+42=51
y=9
x=12
4
The triangle itself
Also the 3 at the top
They are the only ones with 3 sides
