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______ ______
5 - (-5) = 1 - (-1)
y + 5 = x + 1
____ _____
5 + 5 = 1 + 1
y + 5 = x + 1
____ _____
10 2
2(y + 5) = 10(x + 1)
2y +10 = 10x + 10
2y = 10x + 10 - 10
2y = 10x
y = 5x