Solving equations using substitution practice

Answer 1

1. Solve the equation 3x + 5 = 11 using substitution.
3x + 5 = 11
3x = 6
x = 2

2. Solve the equation 2y - 7 = 11 using substitution.
2y - 7 = 11
2y = 18
y = 9

3. Solve the equation 4a + 9 = 25 using substitution.
4a + 9 = 25
4a = 16
a = 4

4. Solve the equation 2b - 3 = 7 using substitution.
2b - 3 = 7
2b = 10
b = 5

5. Solve the equation 5c + 2 = 17 using substitution.
5c + 2 = 17
5c = 15
c = 3

6. Solve the equation 6x + 8 = 32 using substitution.
6x + 8 = 32
6x = 24
x = 4

7. Solve the equation 3y - 4 = 14 using substitution.
3y - 4 = 14
3y = 18
y = 6

8. Solve the equation 9a + 6 = 33 using substitution.
9a + 6 = 33
9a = 27
a = 3

9. Solve the equation 7b - 5 = 12 using substitution.
7b - 5 = 12
7b = 17
b = 2.43 (rounded to two decimal places)

10. Solve the equation 4c + 3 = 19 using substitution.
4c + 3 = 19
4c = 16
c = 4