Question 1:
Solve the linear equation
Answer:
L.C.M. of the denominators, 2, 3, 4, and 5, is 60.
Multiplying both sides by 60, we obtain
⇒ 30x − 12 = 20x + 15 (Opening the brackets)
⇒ 30x − 20x = 15 + 12
⇒ 10x = 27
⇒
Question 2:
Solve the linear equation
Answer:
L.C.M. of the denominators, 2, 4, and 6, is 12.
Multiplying both sides by 12, we obtain
6n − 9n + 10n = 252
⇒ 7n = 252
Question 3:
Solve the linear equation
Answer:
L.C.M. of the denominators, 2, 3, and 6, is 6.
Multiplying both sides by 6, we obtain
6x + 42 − 16x = 17 − 15x
⇒ 6x − 16x + 15x = 17 − 42
⇒ 5x = −25
Question 4:
Solve the linear equation
Answer:
L.C.M. of the denominators, 3 and 5, is 15.
Multiplying both sides by 15, we obtain
5(x − 5) = 3(x − 3)
⇒ 5x − 25 = 3x − 9 (Opening the brackets)
⇒ 5x − 3x = 25 − 9
⇒ 2x = 16
Question 5:
Solve the linear equation
Answer:
L.C.M. of the denominators, 3 and 4, is 12.
Multiplying both sides by 12, we obtain
3(3t − 2) − 4(2t + 3) = 8 − 12t
⇒ 9t − 6 − 8t − 12 = 8 − 12t (Opening the brackets)
⇒ 9t − 8t + 12t = 8 + 6 + 12
⇒ 13t = 26
Question 6:
Solve the linear equation
Answer:
L.C.M. of the denominators, 2 and 3, is 6.
Multiplying both sides by 6, we obtain
6m − 3(m − 1) = 6 − 2(m − 2)
⇒ 6m − 3m + 3 = 6 − 2m + 4 (Opening the brackets)
⇒ 6m − 3m + 2m = 6 + 4 − 3
⇒ 5m = 7
⇒
Question 7:
Simplify and solve the linear equation
Answer:
3(t − 3) = 5(2t + 1)
⇒ 3t − 9 = 10t + 5 (Opening the brackets)
⇒ −9 − 5 = 10t − 3t
⇒ −14 = 7t
Question 8:
Simplify and solve the linear equation
Answer:
15(y − 4) − 2(y − 9) + 5(y + 6) = 0
⇒ 15y − 60 − 2y + 18 + 5y + 30 = 0 (Opening the brackets)
⇒ 18y − 12 = 0
⇒ 18y = 12
⇒
Question 9:
Simplify and solve the linear equation
Answer:
3(5z − 7) − 2(9z − 11) = 4(8z − 13)−17
⇒ 15z − 21 − 18z + 22 = 32z − 52 − 17 (Opening the brackets)
⇒ −3z + 1 = 32z − 69
⇒ −3z − 32z = −69 − 1
⇒ −35z = −70
⇒
Question 10:
Simplify and solve the linear equation
Answer:
0.25(4f − 3) = 0.05(10f − 9)
Multiplying both sides by 20, we obtain
5(4f − 3) = 10f − 9
⇒ 20f − 15 = 10f − 9 (Opening the brackets)
⇒ 20f − 10f = − 9 + 15
⇒ 10f = 6
⇒