Savings and retirement

The older sibling has saved 44% more euros than the youngest, which represents 22 euros. How many euros older brother has saved?

Correct answer:

x =  72 eur

Step-by-step explanation:


x = (1+44/100)y
x-y = 22

x = (1+44/100)·y
x-y = 22

100x-144y = 0
x-y = 22

Row 2 - 1/100 · Row 1 → Row 2
100x-144y = 0
0.44y = 22


y = 22/0.44 = 50
x = 0+144y/100 = 0+144 · 50/100 = 72

x = 72
y = 50

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