Question 336302
{{{-9(2r+8)+10(2r+4)=-9(2r)-9(8)+10(2r)+10(4)=-18r-72+20r+40=(-18r+20r)+(-72+40)=2r-32}}}



So {{{-9(2r+8)+10(2r+4)=2r-32}}}



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Jim