dahila has just enough money to buy either 6 pears and 20 oranges or 12 oranges and 11 pears .Each pear cost $0.80.How much does an orange cost.
\(We \space will \space let\space the\space cost\space of\space the\space orange\space be\space $x\)
\(6 \times 0.80 + 20x = 12x + 11\times 0.80\\ 4.80 + 20x=12x+8.80 \\ 4.80+8x=8.80\\ 8x=4\)
Do the last bit yourself. Trust me, it's easy.
