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PEMDAS

200

(6-3) x 4 x 4

48

300

5 + 6 / (6-3)

7

400

2 + 1 + (13+2) / 3

8

500

3³ + 10 / 5 - 3

26

Proportions!

200

(2/3) = (6/r+6)

r=3

300

(3/10) = (10/r-1)

r=34.333333

400

(5/4) = (2/r+2)

r=-0.4

500

(6/9) = (10/p+6)

p=9

percentage probs

200

7% of what is 54?

771.4

300

What percent of 127 is 115?

90.6%

400

82% of what is 41?

50

500

180% of 33 is what?

59.4

EQUATIONS :)

200

-2(1+5r) = -62

r=6

300

-90 = 4(5n+4) - 6

n=-5

400

4k + 16 = -8(k+4)

k = -4

500

4(-4+7k) +8k = k - 16

k = 0