Substitute Values: Substitute the given values of b and c into the expression.We have b=2 and c=−(47). So we substitute these values into the expression b−(−(81))+c to get 2−(−(81))−(47).
Simplify Expression: Simplify the expression by removing the double negative.The expression 2−(−(81)) becomes 2+(81) because subtracting a negative is the same as adding a positive.
Add Fractions: Add the fractions(81) and −(47). To add these fractions, we need a common denominator. The least common denominator for 8 and 4 is 8. So we convert −(47) to −(814) to have the same denominator.
Add Common Denominator: Add the fractions with the common denominator.Now we add (81) and −(814) to get (81)−(814)=−(813).
Add Whole Number: Add the whole number and the fraction.Finally, we add the whole number 2 to the fraction −813. Since 2 is the same as 816, we have 816−813=83.
More problems from Evaluate multi-variable expressions