Hi,
crate of oranges weighs eight pounds more than a crate of bananas
and a crate of kiwi weighs one third as much as a crate of bananas
Let x, (x+8), x/3 represent the crate weight for bananas, oranges and kiwis
Question states*** Together the three crates weigh 43 pounds
x + (x+8) + x/3 = 43lb