Solve the equation 6x + 3y = 15 for y. What does y equal if x = 2? If x = 5

Y=-2x+5; y=1 (x=2); y=-5 (x=5)

If x equals 2 then 6 times 2 equals twelve. And twelve plus 3 equals fifteen. So y equals 1. Three times one equals three and 12 plus three equals fifteen. If x equals five, 6 times 5 equals 30. 30-15 = 15. To get 3y you need it to equal negative fifteen so y equals negative five.