The amount a shoe store charges in dollars to deliver #x# pairs of shoes can be modeled by the equation #y= 40x +30#. If the total bill was $350 dollars, how many pairs of shoes did they deliver?

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Answer 1 · 2017-10-27T10:51:55

They delivered # 8 # pairs of shoes.

#y=40x+30 ; x # is number of pair of shoes and #y# is

total bill for charges. #:.350=40x+30 or 40 x =350-30# or

#40x=320 :. x=320/40 = 8 # pairs.

They delivered # 8 # pairs of shoes. [Ans]

Answer 2 · 2017-10-27T10:54:14

The equation would be #40x+30=350#

Subtract #30# from both sides:
#40x+cancel30-cancel30=350-30->40x=320#

Divide both sides by #40#
#(cancel40x)/(cancel40)=320/40->x=8#