Write two different linear expressions that are equivalent (both expressions should be equal but not look the same and include at least one variable) and explain why they are equivalent! Please help :D?

your answer is 125y5

if i'm not wrong, i would say that the third angle has (72) because the three sides of all triangles have 180 degrees and if we subtract 180 - 62 - 40 = (72) / but i'm not sure about 40 yd.