A. Fill in the blanks to make the statements true.
1. If 2x = 14 , then x is
2. If x + 4 = 3, then x is
3. If 3x+6=12. , the 3x is
4. If 2x + 8 = 14 , the 2x is
5. If 2x + 4 = 3x - 5 then 3x - 2x is
6. If x + 5 = 4 then - x - 5 is
7. If x - 8 = 24 , the x is
8. If 4x + 2 = 8 then x + 1 is
9. If 21-5× =2 the 5x is
10. If x - 5 = 10 , then x - 10 is
B. Solve for N in each equation. Write your answer on the blank.
1. 3N - 4 = 5 N=
2. 2N + 5 = 17 N=
3. N / 3 - 8 = 5 N=
4. N / 2 + 8 = 30 N=
5. 2(N + 4) = 5 N=
1. If 2x = 14 , then x is
2. If x + 4 = 3, then x is
3. If 3x+6=12. , the 3x is
4. If 2x + 8 = 14 , the 2x is
5. If 2x + 4 = 3x - 5 then 3x - 2x is
6. If x + 5 = 4 then - x - 5 is
7. If x - 8 = 24 , the x is
8. If 4x + 2 = 8 then x + 1 is
9. If 21-5× =2 the 5x is
10. If x - 5 = 10 , then x - 10 is
B. Solve for N in each equation. Write your answer on the blank.
1. 3N - 4 = 5 N=
2. 2N + 5 = 17 N=
3. N / 3 - 8 = 5 N=
4. N / 2 + 8 = 30 N=
5. 2(N + 4) = 5 N=
Answers & Comments
Answer:
A.
1. x=7
2.x=-1
3.3x= 6 (3×2=6)
4.2x=6 (2×3)
5.3x-2x=9 {3(9)- 2(9) =27-18=9}
6.-x-5= -6 (-1-5=-6)
7.x=32
8.undefined
9. 5x= -25 (5×-5)
10.x-10=5 (15-10=5)
B.
1.N=3
2. N=6
3.N=39
4.N=44
5.N=-3/2