3-11 MORE EQUATIONS !. HOW TO SOLVE  In some problems, we have things we do not know.  When this happens we let a letter represent the unknown (Let.

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Presentation transcript:

3-11 MORE EQUATIONS !

HOW TO SOLVE  In some problems, we have things we do not know.  When this happens we let a letter represent the unknown (Let x = …..)  After we do that we will express the other unknown in terms of the variable (letter)

WORDS TO KNOW Integer- a number Consecutive- what comes next (in order) Next larger integer- x+1 Odd integers- (x+2), (x+4), … Even integers- (x+2), (x+4), …

COMPOUND PHRASES The cost of a main floor seat is three times as much as the cost of a balcony seat. Write an expression showing the total cost of each seat.

EXAMPLE There are half as many boys in a certain club as there are girls. Write an expression for the total number of boys and girls in the club.

EXAMPLE Write an expression for the sum of an integer and three times the next larger integer

EXAMPLE Write the expression for the sum of three consecutive odd integers.

PROBLEM SOLVING Manuel scored 35 points fewer in his second bowling game than in his first game. His total score for two games was 395. How many points did he score in each game?

EXAMPLE The perimeter of a rectangle is 150 cm. The length is 15 cm greater than the width. Find the dimensions.

EXAMPLE The sum of an integer and twice the next consecutive integer is 29. What are the integers?

EXAMPLE Mrs. Lee deposited a sum of money in a savings account that pays 4% interest per year. At the end of one year Mrs. Lee had a total of $9620 in her account. How much did she originally deposit?

PRACTICE!!! Pg #1-20