Expanding single brackets (simple)
Expand 2(x + 3)
2x + 6
Expand 3 + 2(x + 9)
2x + 21
Expand -3(x + 4)
-3x - 12
Expand 10y -8(4x - 5y)
50y -32x
Joan has $3 left after buying 6 cups at $p each. Write an algebraic expression for the amount of money she had at first.
$(6p+3)
Expand 3b(a + 4)
3ab + 12
Expand 2(x + 4) + 5(2x + 3y)
12x + 15y + 8
There are (2a + b) books in a pile. The thickness of each book is 2 cm. Find the height of the pile of books in terms of a and b, expressing your answer in the expanded form.
4a + 2b
Expand -4x(y - 6)
-4xy + 24x
Expand 3y(2 - 3x) - 2(x +4y)
-2x -2y-9xy
Benson is x years old.
Julia is thrice as old as Benson.
David is 10 years older than Julia.
Write down an expression in terms of x for the total sum of their ages.
7x+10
Expand (4a-8b+12c)(-5)
-20a + 40b - 60c
Expand -(2x - 5a) - (11 +9x - 4a)
-11x + 9a - 11
Laura is x years old now. Her mother was 4 times as old as Laura 5 years ago. Express the present age of Laura's mother in terms of x.
4x - 15