Question 645993
{{{-9+4r=4r-3-6}}} Start with the given equation.



{{{-9+4r=4r-9}}} Combine like terms on the right side.



{{{4r=4r-9+9}}} Add {{{9}}} to both sides.



{{{4r-4r=-9+9}}} Subtract {{{4r}}} from both sides.



{{{0r=-9+9}}} Combine like terms on the left side.



{{{0r=0}}} Combine like terms on the right side.



{{{0=0}}} Simplify.



Since this equation is <font size=4><b>always</b></font> true for any r value, this means r can equal any number. So there are an infinite number of solutions.


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