Answer:

Explanation:
E is 5 more than d
f is 7 less than d
a) e = d + 5
b) f = d - 7
c) plug the values of e and f

When there is a ( - ) in front of an expression in parentheses, change the sign of each term in the expression

Since, two opposites add up to zero , remove them from the expression

Add the numbers

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