Algebra

Do these sums, show your working:

• 5(4+3n)+25
• 7(2n+3k)+3(2n+12)
• n(m+n)-3
• q(y+c)

• 45+15n
• 20n+21k+36
• mn(squared)-3
• qy+cq 

Do these, show your working:

• My mum is 25 years older than me and our total age is 37. How old are we?
• I buy two plain chocolate bars, but one is £3.00 more! The total bill is £4.20, so how much are they?
• I have two dogs, Scampi and Daisy. Scampi is 5 years older than Daisy. Their total age is 25, so how old they?
• Mary and Marianne have blonde hair, Mary's hair is 13cm shorter than Marianne's, and their total hair length is 75cm. Give the length of both girls' hair.

• I am 6 and my mum is 31
• The cheap coke is 60p and the expensive coke is £3.60
• Daisy is 10yrs old and Scampi is 15yrs old