SOLUTION: evaluate each of the expressions if a=-2 b=5, c=-4, and d = 6 4b + 5d - c/a

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Question 85357: evaluate each of the expressions if a=-2 b=5, c=-4, and d = 6
4b + 5d - c/a
Answer by bucky(2189) About Me  (Show Source):
You can put this solution on YOUR website!
Given the expression:
.
4b+%2B+5d+-+c%2Fa
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Evaluate the expression if a=-2 b=5, c=-4, and d = 6
.
All you need to do is to substitute the given values for a, b, c, and d into the given
expression and then simplify it.
.
Put -2 in place of a, +5 in place of b, -4 in place of c, and +6 in place of d and the given
expression becomes:
.
%284%2A5%29%2B%285%2A6%29-%28%28-4%29%2F%28-2%29%29
.
Multiply out the terms in the first two sets of parentheses to get:
.
20%2B30+-+%28%28-4%29%2F%28-2%29%29
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In the third term divide -4 by -2 to get +2 and the expression then becomes:
.
20+%2B+30+-+%282%29
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Finally, 20 + 30 - 2 algebraically adds to 50 - 2 which is 48.
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The answer to the given problem is 48.
.
Hope this helps you to see how to solve this problem by substituting numbers in place of
the letter variables.