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If 5x – 8 = 12 and x = y + 3, then y : Problem Solving (PS)
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# If 5x – 8 = 12 and x = y + 3, then y

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Re: If 5x – 8 = 12 and x = y + 3, then y [#permalink]
equation 1:
5x-8=12
=>5x=20

equation 2:
x=y+3
=>5x= 5y + 15 (multiplied 5 to both sides)
=>20=5y+15 (from equation 1)
=>5y=5
=>y=1
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Re: If 5x – 8 = 12 and x = y + 3, then y [#permalink]