Seller weekend earnings

During the holidays, the seller earned € 21,060. He earned 40% more on Saturday than on Friday. He earned € 2,500 less on Sunday than on Saturday. How many euros did the seller make on Saturday?

Final Answer:

s =  8680 Eur

Step-by-step explanation:


p+s+n=21060
s = p+0.40p
n = s-2500

p+s+n=21060
s = p+0.40·p
n = s-2500

n+p+s = 21060
1.4p-s = 0
n-s = -2500

Row 3 - Row 1 → Row 3
n+p+s = 21060
1.4p-s = 0
-p-2s = -23560

Row 3 - -1/1.4 · Row 2 → Row 3
n+p+s = 21060
1.4p-s = 0
-2.714s = -23560


s = -23560/-2.71428571 = 8680
p = 0+s/1.4 = 0+8680/1.4 = 6200
n = 21060-p-s = 21060-6200-8680 = 6180

n = 6180
p = 6200
s = 8680

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