r = 5z
15z = 3y (divide by 3 to both sides)
5z = y
r = y
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if r=5z and 15z =3 then r=10y
It would appear that r = y
3 equals rings in a circus
10 = r + 3 Subtract 3 from each side: 7 = r
You subtract 11 from both sides and r equals negative 7. See... r+11=3 -11 -11 r=7