Please help me with this

pickle  cellsus

Step-by-step explanation:

I would say the top one is correct because it says the sum is 42 so the equation has to go =42

And a number is the first part that they say. There’s nothing else with it, meaning it’s x by itself. So it’s x+ =42 to far

And it’s square is x2 so it’s x2 + x = 42