Jane paid $40 for an item she received a 20% discount. janes friend says this means that the original price of the item was $48

Jane's friend is wrong.  The original price was $50

Step-by-step explanation:

Jane got a 20% discount, so she paid 80% of the original price.  As a ratio she paid

80% ÷ 100% = 80/100 = 4/5

She paid four fifths the regular price, so we can set up an equation to find out what that price was.

(4/5)x = 40      (four-fifths of some value is 40)

now solve for x

multiply both sides by 5 to get rid of the fraction..

4x = 200

divde both sides by 4 to isolate x

x = 50

$50 was the original price

sorry i dont know my friend

no, the equation would be invalid since they are both not equal.

step-by-step explanation:

here you got

4y-6+4y 2-9

first, you would simplify the equation on the form.

4y-6+4y 2-9

then, move all the terms that contains a y to the left and all the other terms to the right.

+4y-4y+-9-6

finally, you will simplify the left and the right side of the equation.

y=-3