ALGEBRAIC EXPRESSIONS

Write each sentence as an algebraic equation.

1.
Sentence
Algebraic Equation
A number increased by nine is fifteen. y + 9 = 15
Twice a number is eighteen. 2n = 18
Four less than a number is twenty. x - 4 = 20

2
Sentence
Algebraic Equation
Twice a number, decreased by twenty-nine, is seven. 2t - 29 = 7
Thirty-two is twice a number increased by eight. 32 = 2a + 8
Twelve is sixteen less than four times a number. 12 = 4x - 16

MATHS LOWER SECONDARY

CONTENTS:-
CHAPTER 1: DIRECTED NUMBERS
CHAPTER 2: SQUARES, SQUARE ROOTS, CUBES AND CUBE ROOTS
CHAPTER 3: ALGEBRAIC EXPRESSIONS II.
CHAPTER 4: LINEAR EQUATIONS
CHAPTER 5: RATIOS, RATES AND PROPORTIONS
CHAPTER 6: PYTHAGORAS' THEOREM
CHAPTER 7: GEOMETRICAL CONSTRUCTIONS
http://wims.unice.fr/wims/wims.cgi?session=M6A6F0F6C3.57〈=en&cmd=new&module=contrib/Cochise2000.en&exo=CombinSignedNu&qnum=1&qcmlevel=4&scoredelay=
here are some useful link to the above chapter:
try it now:-
http://www.maths.com/numbers.directed.CombineDoubleSignedNumbers.htm
http://wims.unice.fr/wims/wims.cgi?session=M6A6F0F6C3.
57〈=en&cmd=new&module=contrib/Cochise2000.
en&exo=CombinSignedNu&qnum=1&qcmlevel=4&scoredelay=
http://www.staff.vu.edu.au/mcaonline/units/numbers/numdir.html
http://math.about.com/od/algebraworksheets/Algebra_Worksheets.htm