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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!

Q: What is y in 12 y 14?

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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

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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

-12

14

12

6 and 14 Solution x - y= 8, so x =8 + y, (x + y)/2 = 10, x + y = 20, Substituting x = 8 + y, we have: 2 y + 8 = 20, or 2y = 12, y = 6, x = 6+8= 14

14

y = 14

14 - 3y = 2 subtract 14 from both sides -3y = -12 divide both sides by -3 y = 4

15y+14=2(5y+6) 15y+14=10y+12 15y+14-14=10y+12-14 15y=10y-2 15y-10y=10y-2-10y 5y=-2 y=-2/5

y-14 = 16 y = 16+14 y = 30

x+y=2x-y=26x=2-yx=26+y2-y=26+y-24=2y-12=yx+(-12)=2x=14You can verify this by plugging -12 and 2 into the original equations.14+(-12)=214-(-12)=26