Mixing operations with numbers

Subtract twice the number -23.6 from the difference of the numbers -130 and -40.2.

Correct result:

x =  -42.6

Solution:

a=−130−(−40.2)=−89.8 b=2⋅ (−23.6)=−47.2  x=a−b=(−89.8)−(−47.2)=−2135=−42.6

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