X=1/5 (One-fifth)
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It is: (5x-1)(5x+1) = 0 when factored
4 + 5x = 1 5x = 1 - 4 5x = -3 x = -3/5 x = -0.6
5x+1=20 5x=20-1 5x=19 5x/5=19/5 x=19/5
Multiply the bottom equation by -1
If y equals 5x-15 and x equals 1 then the value of y comes out to be -10. So y equals 5x-15 is -10.