Free Version
Moderate

ALGEBR-EPNKKP

Combine the like terms of the following equation:

$$3xy + 2xy - xy + 7$$

A

$4xy + 7$

B

$6xy + 7$

C

$5{x}^{2}{y}^{2} + 7$

D

$4{x}^{2}y + 7$