Tailor's 40591

The tailor's salon bought 130 m of fabric for € 1,037. The meter of the 1st fabric costs € 8.90, and the meter of the 2nd fabric costs € 7.40. How many meters did they buy?

Correct answer:

a =  50 m
b =  80 m

Step-by-step explanation:

a+b=130 8.90 a+7.40 b=1037  a+b=130 8.9a+7.4b=1037  Pivot:Row1Row2 8.9a+7.4b=1037 a+b=130  Row28.91 Row1Row2 8.9a+7.4b=1037 0.17b=13.48  b=0.1685393313.48314607=80 a=8.910377.4000000000001b=8.910377.4 80=50=50 m  a=50 b=80

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