From the equation 2x - 5y + 20 = 0, find the value of y when x = -5.
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2x - 5y + 20 = 0
2(-5) - 5y + 20 = 0
-10 - 5y + 20 = 0
-15y + 20 = 0
-15y = -20
y = -20 /-15
y = 4/5
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