Chapter 6 Linear Equations

Which of the following is an expression?

• 6x + 2x = 6
• 10 = 5x
• 2x + 6x - 10
• 6x² + 10 = 25

Which of the following is an equation?

• 6x + 2x - 6
• 6x² + 10 = 25
• 6x² + 10 - 25
• 10y - 6 + 34u

State the linear equation in one variable that is suitable for this situation:

"The price of an exercise book is thrice the price of a pen. Yahya buys 2 exercise books and 8 pens. She makes a payment of RM50 and received a balance of RM8."

• 50 + 8 = 14y

• 50 - 10y = 8

• 50 - 14y = 8

• 8 + 10y = 50

Find the value of x.

3x + 3 = 15

Just give a number as the answer.

(a)  

Find the value of y.

 $\frac{2}{3}$ y – 9 = 7

Just give a number as the answer.

(a)  

Find the value of m.

2(m + 4) = 22

Just give a number as the answer.

(a)  

Find the value of k.

4k – 8 = 10k + 16

Just give a number as the answer.

(a)  

Which of the following equations are linear equations in two variables?

• $\frac{y}{6}+4=–2x$

• $5a^3–4=4b$

• $3h–1=5k$

• $k+1=6$

Solve the following simultaneous linear equations.
(Write your answer as h=__, k=__)

 $h+k=3$  

 $3h+k=–1$   

(a)  

Solve the following simultaneous linear equations.
(Write your answer as u=__, v=__)

 $5u–2v=–4$  
 $2u+5v=–19$  


(a)