Sum
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Difference
Evaluate
100

Find the sum 

4+16 = 

20

100

z minus 7

z - 7

100

x + 15 = -3

x = -18

100

3 - (-9) =

12
100

Evaluate the given expressions when a = -3, b = 9, c = -5, and d = -2.


a + c =

(-3) + (-5) = -8

200

-12 + 5 =

=-7

200

One-half the sum of r and 8

(1/2)(r + 8)

200

-2m = 8

m = -4

200

-19 - (15) =

-34

200

Evaluate the given expressions when a = -3, b = 9, c = -5, and d = -2.


d - b = 

(-2) - (9) = -11

300

-16 + 17 =

1
300

5 less than one-fourth of a number

(1/4)x - 5

300

(x/5) = 4

x = 20

300

71 - (-14) =

85

300

Evaluate the given expression when x = 5, y = 3, and  z = -1

xyz

-15

400

-5 + (-13) = 

-18

400

The sum of a number and 27

x + 27

400

2x + 9 = -7

x = -8

400

-14 - (14) =

-28

400

Evaluate the given expressions when a = 8, b = 1/2, and c = -2

a2b2

4

500

-8+(-4) = 

-12

500

3 times the difference between 6 and a number

3(6 - x)

500

(x+7)/5 = -3

x = -22

500

-18 - (-14) =

-4

500

Evaluate the given expressions when d = -4, e = 2.5, and w = 7

2ed2

80