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Relating Variables

ACTMAT-RA4LT5

If: $P = x + 2$, $Q = 3x +1$, $R = 2x + 3$ and $P + Q = R + S$, then which of the following represents $S$ in terms of $x$?

A

$x$

B

$2x - 6$

C

$2x$

D

$6 - 6x$

E

$\cfrac{4x}{3}$