Solving equations

Solving Simple Equations

100

m + 4 = 11

m = 7

200

z - 5 = 5

z = 10

300

14p = 42

p = 3

400

y - 189 = 72

y = 261

500

128 + x = 257

x = 129

Solving proportions

100

1/9=x/45

x=5

200

y/7=2/14

y=1

300

3/x=5/15

x=9

400

2/9=5/z

z=22.5

500

p/43=5/8

p=26.875

Is it balanced?

100

15 + 3 = 12 + 6

yes 18=18

200

50 - 14 = 34 + 12 

no 36 does not equal 46

300

19 + 3 = 3² + 13

yes 22=22

400

7² - 11 = 40 + 3

no 38 does not equal 43

500

2 + 2²*3 = 20 - 6

yes 14=14

Substitute

100

evaluate 4x+5 when x = -3

-7

200

evaluate x³ + 7, when x=2

15

300

evaluate 7 + 3x*2, when x = -1

1

400

Evaluate 6² + (x - 3) *2, when x=4

38

500

evaluate x - (3^x+1) when x = 2

-8