| a) x = 9 | b) x = 19 | c) x = 4 | d)x = 28 |
| e) x = 40 | f) x = 7 or -7 |
2. Full solutions are shown for the last two.
| a)x=5 | b) x = 4 | c) x = 18 | d) x = 28 |
| e) x-8 = 15 (÷ 3) x= 23 ( + 8) | f)x+3 = 20 (× 5) x=17 ( - 3) | ||
3.
| a) 4=2x x=2 | b) 15=5x x=3 | c)16=4x x=4 | d) 42 = 7x x=8 |
4.
| a) 2x = 4 x = 2 | b) 3 = 2x - 3 6 = 2x x =3 | c) 3x - 16 = -1 3x = 15 x = 5 | d) 5 = 1/2 x + 1 4 = 1/2x 8 = x |
| e) 6x - 3 = 5x + 1 x - 3 = 1 x = 4 | f) x - 4 = 3 x = 7 |
Solutions to examples
1 step equations:
| 2. n=14 | 3. n=21 | 4. n=18 |
| 2. 4n=16 so n=4 | 3. n/4 = 1 so n=4 | 4. n/3 = 4 so n = 12 | 5. n+5=6 so n=1 |
Solution to puzzle
The equation you should have formed is:
j + (j-3) + 6j + 6j + 6 =73
14j + 3 = 73
14j=70 so j=5
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