+
-
*
#
100

- 5 + 10

5

100

2 - 10

-8

100

2 x (-10)

- 20 

100

10x = 20

X = 2 

200

- 10 + 10 + 15

15

200

5 - 15 - 5

-15

200

5 x (-5) x (-1)

25

200

- 15 + 10x = 25

X = 4

300

5 + 2( 4 + 2 )

42

300

2 - 5( 6 - 2 )

-12
300

2( - 5 x 3 )

-30 

300

2( -5x + 10 ) = 40

X = -2

400

- 5 + 10 + 2( 3 + 2 + 6)

77

400

5 - 10 - 2( 4 - 2 - 10 )

56

400

4 x - 4( 5 x - 2 x 1 ) 

160 

400

2/4 ( 5x - 20 + 10 ) = 20

X = 10 

500

3(2 + 2) + 2(3 + 4)

26

500

- 10 - 20( - 1 + 1 )

-30

500

- 7 x - 1 x 2 ( 5 x - 5 ) + ( 2 x - 2 )

346

500
4/6 ( 2x + 5 - 2 + 4 ) = 2

X = -2

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