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Mathematics 10 Online
OpenStudy (anonymous):

5x + 8y = -29 7x - 2y = -67 solve by elimination.

OpenStudy (mertsj):

Multiply the second equation by 4 and add the result to the first equation.

OpenStudy (anonymous):

thanks! & i got one more problem:)

OpenStudy (mertsj):

What is it?

OpenStudy (anonymous):

A restaurant sells 2 eggs, and 1 toast for $3. They also sell 1 egg, and 1 toast for $1.80. What's the egg's price? Toast price?

OpenStudy (mertsj):

2e+1t=3 1e+1t=1.80

OpenStudy (mertsj):

Subtract the two equations.

OpenStudy (anonymous):

1e = 1.20 for the egg?

OpenStudy (mertsj):

yep

OpenStudy (anonymous):

what about toast?

OpenStudy (mertsj):

Well if 1 egg + 1 toast is 1.80 and the egg is 1.20, how much is the toast?

OpenStudy (anonymous):

60 cents?

OpenStudy (mertsj):

yep

OpenStudy (anonymous):

thank you!!!!

OpenStudy (mertsj):

yw

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