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Solving equations
100

42 + (-8) 

34

100
(-5) x (-8)

40

100

(3 x 4) - 9

3

100

Write an expression for a number plus 7

n + 7

100

c + 7 = 15

c=8

200

(-15) -5

-20

200

28÷(-4)

-7

200

(3 + 5) + (6 + 7) 

21

200
Write an expression for the sum of a number and 12

n + 12

200

4r = 16

r = 4

300

25-(-7) - (-4)

36

300

(-20) ÷ (-5)

4

300

(16 ÷ 4) x (5 + 5)

40

300

Evaluate the expression n+ 5 when n=5

10

300

7s = 42

s=6

400

22+ (-10) + (-16) + 5

1

400

5 x (-4) x (-3)

60

400

(-8) + (10 - 4) + 2

0

400

Evaluate the expression 3n - x when n=5 and x=3

12

400

y + (-3) =6 

y = 9

500

14 + 9 - 6 - 4

13

500

132÷(-11) ÷4

-3

500

(16 x 2) + (8 ÷ 4) - (17 - 9)

26
500

Evaluate the expression (6n + x - y) when n=5, x=3, y=2

31

500

r/6 = 8

r = 48