6.5 ANSWERS supporting path 

Answers exercise 1:

Simplify 

a) 7x + 2x 

= 9x

 

b) 8y - 3y 

= 5y

 

c) 4a - a 

= 4a - 1a 

= 3a 

 

d) 19q - 6b 

= 19q - 6b 

         or 

= n.a. (no answer)

 

e) 7b + 10b - 3b

= 17b - 3b 

= 14b 

 

f) -8m - 5m - 9m 

= - 18m - 9m

= -27m 

 

g) 2g + 8u - 19g - - 11u 

= 2g + 8u -19g + 11u

= -17g + 19u 

 

h) a - b + a + b 

= a - b + a+ b 

= 2a

adding like terms, subtracting like terms, only add and subtract like terms

Answer exercise 2