y=-x/7-21

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Solution for y=-x/7-21 equation: 


x in (-oo:+oo)

y = -x/7-21 // + -x/7-21

y-(-x/7)+21 = 0

(1/7)*x+y+21 = 0

1/7*x+y+21 = 0 // - y+21

1/7*x = -(y+21) // : 1/7

x = (-(y+21))/1/7

x = -7*(y+21)

x = -7*(y+21)

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