Algebraic Notation
3� is the same as writing 3 x � . There are three apples. If we use x rather than � then the
same rules apply. 3x is the same as 3 x x.
Replacing numbers with symbols, solve the equations on the right hand side by looking at
the examples on the left.
3� + 4� = 7�
3x + 4x =
3 x 4� = 12�
3 x 4x =
3� + 4� = 3� + 4�
3x + 4y =
3� + 4� + 3 x 4� +3� = 15� + 7�
3x + 4y + 3 x 4x + 3y =