- 1. Three times a number minus 7 is equal to 26. What is the number?
A) 7-3x=26
B) 3x=27
C) 3x-7=26
D) 3·(x-7)=26
- 2. The sum of a number and one half of the number is 42. What is the number?
A) x+x/2=42
B) x/2=42
C) 2/x=42
D) x+2/x=42
- 3. The sum of twice a number and 7 is equal to 3 times the number minus 17. Find the number
A) 2x+7=3x+17
B) 2x=3x-17
C) 2x+7=3x-17
D) 2x+7=17-3x
- 4. Twice a number minus 9 is equal to 17. What is the number?
A) 9-2x=17
B) 2x=17
C) x+2x-9=17
D) 2x-9=17
- 5. The sum of a number and 22 is equal to 3 times the number. What is the number?
A) 22=3x
B) x+22=x+3x
C) x+22=3x
D) x-22=3x
- 6. 10 times a number is equal to 3 times the number plus 35. Find the number
A) 10x=3x+35
B) 10+x=3x+35
C) 10x+3x=35
D) 10=3x+35
- 7. In 4 years, Carol's age will be 3 times her age 14 years ago. How old is she?
A) x+4=3x-14
B) x+4=x-14
C) x+4=3·(x-14)
D) x-14=3·(x+4)
- 8. Troba 2 nombres consecutius tals que el petit més el doble del gran dóna 38.
A) x+1+2x=38
B) x-2·(x+1)=38
C) x+2·(x+1)=38
D) x+2x+1=38
- 9. Un nombre sumat amb la seva tercera part dóna 104. Quin nombre és?
A) x+1/3=104
B) x/3=104
C) x+3x=104
D) x+x/3=104
- 10. Una jaqueta rebaixada un 15% val 44,20€. Quin era el preu abans de la rebaixa?
A) 15x/100=44,20
B) x-15/100=44,20
C) x-100x/15=44,20
D) x-15x/100=44,20
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