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3y - 7 = y + 1
(Take away 1 from both sides)
3y - 8 = y
(Take away y from both sides)
2y - 8 = 0
(Add 8 to both sides)
2y = 8
(Divide both sides by 2)
y = 4
1
2
(3, 1)
x = 1 and y = -2
y=10
(1, 9)
y=x+1 there for answer is 2
They are expressions.
Y = 2x + 1
It is: 1
The solution is: x = 1 and y = -1