Unfortunately, the browser used for posting questions is hopelessly inadequate for mathematics: it strips away most symbols. All that we can see is "y in 12 y 14". From that it is not at all clear what the missing symbols (operators) might be. It makes little sense for me to try and guess - I may as well make up my own questions and answer them!
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x =shirt y =sweater shirt + sweater = $40 x + y = 40 shirt + 12 = the price of the sweater (price of the sweater is $12 more than the shirt) x + 12 = y x + y = 40 x + (x + 12) = 40 2x + 12 = 40 2x + 12 - 12 = 40 - 12 2x = 28 2x / 2 = 28 / 2 x = 14 x = shirt = $14 IF... shirt + sweater = $40 x + y = 40 14 + y = 40 14 + y - 14 = 40 - 14 y = 26 y = sweater = $26
12
14
y = 14
14 - 3y = 2 subtract 14 from both sides -3y = -12 divide both sides by -3 y = 4