Company X has 40 employees and company Y has 50 employees

Company X has 40 employees and company Y has 50 employees. Both companies have the same number of full time employees, but company Y has 4 more than twice the number of part-time employees that Company X has. How many part-time employees does Company Y have?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · dev #133