Answer
8x10 portrait is \$12
wallet is $7
No, a variable cannot be eliminated by adding or subtracting. One equation must be multiplied by a constant.
Work Step by Step
x=8 x 10 portrait, y = wallet
$2x+4y = 52$
$3x+2y = 50$
$2x+4y = 52$
$-2*(3x+2y=50)$
$2x+4y = 52$
$-6x-4y = -100$
$2x-6x+4y-4y=52-100$
$-4x=-48$
$-4x/-4 = -48/-4$
$x=12$
$2*12+4y=52$
$24+4y=52$
$24+4y-24=52-24$
$4y=28$
$4y/4=28/4$
$y=7$
