book Maths Puzzle Numerical Ability

Wes is mixing peanuts and chocolate pieces. Peanuts sell for $4.50 a pound and the chocolate sells for $6.50 a pound. How many pounds of chocolate mixes with 5 pounds of peanuts to

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explain: -14-8+10-(-6)= ??

I get = 10 and 38

help I have trouble only with the substraction. I can do the addition, division and multiplication of positive and negative numbers. I just do not get the substraction of - / + nos.

Thanks Help answer
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