Math

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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)

17

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)

27

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