Successively 18673

Vašek likes to go to the forest to pick mushrooms. He collected them successively for 3 days. Day 1 found seven less than Day 3. On the second day, he collected eight more than on the third day. He collected a total of 79 mushrooms. How much did he collect each day?

Correct answer:

a =  19
b =  34
c =  26

Step-by-step explanation:


a=c-7
b = 8+c
a+b+c=79

a-c = -7
b-c = 8
a+b+c = 79

Row 3 - Row 1 → Row 3
a-c = -7
b-c = 8
b+2c = 86

Row 3 - Row 2 → Row 3
a-c = -7
b-c = 8
3c = 78


c = 78/3 = 26
b = 8+c = 8+26 = 34
a = -7+c = -7+26 = 19

a = 19
b = 34
c = 26

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