6th Ch. 4 Math Review Y3

4-1 Evaluating

100

Evaluate for n = 3, t = -2

3n + 2t

5

200

Evaluate for n = 3, y = 4

5y - 4n

8

300

Evaluate for n = 2, y = 5

2(n + 3y)

34

400

Evaluate for n = -3, t = -2, y = 5

(2ny)/t

15

4-3 Solving Equations by Adding

100

n - 13 = 15

n = 65

200

14.92 = h - 5.63

h = 20.55

300

-32 + b = 29

b = 61

400

x - 23.84 = -9.276

x = 14.564

4-4 Solving Equations by Subtracting

100

x + 12 = 24

x = 12

200

f + 3.4 = 65.7

f = 62.3

300

-126 = 9 + y

y = -135

400

-126.09 = k + 57.4

k = 183.49

4-5 Solving Equations by Multiplying

100

r ÷ 5 = 6

r = 30

200

m/9 = 7

m = 63

300

t/11= -4

t = -44

400

 

k ÷ 2.34 = 14.04

k = 6

4-6 Solving Equations by Dividing

100

4y = 16

y = 4

200

12x = 72

x = 6

300

-5t = 125

t = -25

400

7/6x = -56

x = -48