Math, asked by fizzah3225, 4 months ago

The total cost of 2 similar television and.5 similar washing machines is 7215. each washing machine costs 216 less than a television. How much do 3 television cost?

Answers

Answered by LRabbani
0

Answer:

Step-by-step explanation:

So what you are supposed to be thinking about in this problem is the "unknowns". What is the question? "How much do 3 televisions cost?" We know how many of each we are buying but we do not know what they cost.

"my answer: 2 television + 5 washing machines = 7215"

You are going in the right direction, but what you want to say is,

(2 televisions)(the cost of a television) + (5 washing machines)(the cost of a washing machine) = 7215

It will be much easier to rename these costs as variables. Let,

x = the cost of a television

y = the cost of a washing machine

Now we have a better looking equation.

2x + 5y = 7215

Now, to solve a system of equations using elimination (or substitution) we are going to need another equation! What else does the problem tell you?

"Each washing machine costs $216 less than a television."

Let's rewrite this using our variables.

the cost of a television - the cost of a washing machine = 216

or

x - y = 216

Awesome! Now we have two equations! So our system of equations is....

2x + 5y = 7215

x - y = 216

Try solving the system using the method of elimination or substitution.

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