The following picture represents the first set of crates and rocks Mr. Anderson put on the balance. How many rocks are inside each crate? Write an equation and solve for x (the number of rocks in each crate)

Complementary angles together form a 90 degree angle. I don’t understand the question to well, but if two angles are next to each other and one of them is ten degrees, the other angle would be 80 is Together they form a right angle. Does my explain make sense? Sorry I hope this helps