Parviz F. answered • 07/02/14

Tutor

4.8
(4)
Mathematics professor at Community Colleges

X - amount of $11 mixed

323 - X - amount of $13 mixed.

X ( $11) + ( 312 - X ) 13= 312($) 12

11X + 312* 13 - 13X = 312*12

-2X = -312

X = 156 Amount of $11 mixed

312 - 156 = 156 Amount of $13 mixed.