(ab + 4a - 6) - (ab - 6) = ab + 4a - 6 - ab + 6 = (ab - ab) + (6 - 6) + 4a = 4a
8x+12y=120
8 packs -> x value
12 packs -> y value
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total amt. of beverages is 120
Well what exactly do you need help with?
$255 because you do 130% over 100% = x over 850, than you do 130 times 850 divided by 100 and you get 1105, than you do 1105 minus 850 and you get $255
