|
(use n to represent the number) |
Algebra |
| 1. A number increased by six | n+6 |
| 2. Twice a number decreased by six. | 2n-6 |
| 3. Four less than five times a number | 5n-4 |
| 4. The sum of three times a number and twelve. | 3n+12 |
| 5. One-half a number is fifty | (1/2)n=50 |
| 6. If from twice a number you substract four, the difference is twenty. | 2n-4=20 |
| 7. Twenty-five is nine more than four times a number. | 25=9+4n |
| 8. Sixteen substracted from five times a number equals the number plus four. | 5n-16=n+4 |
| 9. Twenty-five is the same as ten added to twice a number. | 25=10+2n |
| 10. Three x is five less than twice x. | 3x=2x-5 |
| 11. The sum of two y and three is the same as the difference of three y and one. | 2y+3=3y-1 |
| 12. The difference of five and five y is the same as eight and two y. | 5-5y=8+2y |
| 13. Twice the quantity of two y and six. | 2(2y+6) |
| 14. Twice the quantity of seven plus x is the same as the difference of x and seven. | 2(7+x)=x-7 |
| 15. The sum of two y and the quantity of three plus y plus twice the quantity two y minus two equals fifteen. | 2y+(3+y)+2(2y-2)=15 |