Chap 4: Algebra... some notes...

Look at the following... Do they look familiar?
(Let's borrow the knowledge and skills we learnt in Chap 2 to apply here...)

(I) Addition and Subtraction of terms

(1) x + 2x + 4x = 7x
(2) 2x - 7x = -5x
(3) - 6x - 8x = -14x
(4) -3x + (-9x) = -12x
(5) -9x + 2x = -7x


(II) Multiplication of terms