Mattie Math

mattie_math.md

Mattie Math

Minivan

1) 14c + 19h = 421
2) c + h = 24

3) [2 x 14]
14c + 14h = 336

4) [1 - 3]
5h = 85
h = 17

5) [Solve 2 with 4]
c + 17 = 24
c = 7

Piggy bank

1) 0.10d + 0.25q = 10.30
2) d + q = 64

3) [1 x 10]
d + 2.5q = 103

4) [3 - 2]
1.5q = 39
q = 26

5) [Solve 2 with 4]

d + 26 = 64
d = 38

Dave, Frank and Kathy

1) d + f + k = 1300
2) k + f = 850
3) d + f = 780

4) [1-3]
k = 520

5) [Solve 2 with k]
f = 330

6) [Solve 3 with f]
d = 450

Triangle

1) E + F + G = 180
2) 4E = F
3) G = E - 18

4) [Solve 1 with 2]
5E + G = 180

5) [Solve 4 with 3]
5E + E - 18 = 180
6E - 18 = 180
E = 33

6) [Solve 2 with 5]
4 x (33) = F
F = 132

7) [Solve 3 with 5]
G = (33) - 18
G = 15

Bike rentals

1) 4 + 2m = Ca
2) 2.8m = Cb

3) [Ca=Cb; solve m with 1&2]
4 + 2m = 2.8m
4 = 2.8m - 2m
4 = 0.8m
m = 5

Teachers

1) 30c + 50r = 95
2) 40c + 40r = 116

3) [2 * 1.25]
50c + 50r = 145

4) [3-1]
20c = 50
c = 2.5

5) [solve 1 with 4]
75 + 50r = 95
r = 0.4 (40c)

Foooood

1) 4p + 2g = 13.5
2) p + 5g = 17.55

3) [2 * 4]
4p + 20g = 70.2

4) [3 - 1]
18g = 56.7
g = 3.15

5) [Solve 2 with 4]
p + 15.75 = 17.55
p = 1.80

Baseball bats

1) 24w + 30m = 606
2) w + m = 23

3) [2 x 24]
24w + 24m = 552

4) [1 - 3]
6m = 54
m = 9

5) [Solve 2 with 4]
w + 9 = 23
w = 14