Please help me I don’t get this

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!