SOLUTION: Question: solve each of the following systems by using either addition or substitution. If a unique solution does not exist, state wheter the system is dependent or inconsistant.

Question 55842: Question: solve each of the following systems by using either addition or substitution. If a unique solution does not exist, state wheter the system is dependent or inconsistant. The problem is
10x+2y=7
y=5x+3
Can someone help to solve this?
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
1.
2.
In equation 2, get the 5x on the other side of the equation.

Multiply each term by two

now add the two equations....

___________________

divide by 4

Substitute this back into any one of the equations.

Multiply

subtract 13/2 from both sides

Find common denomonators

Combine like terms

Divide by 10 ... or multiply by 1/10 .... it is the same thing.

Your ordered pair is ....
( 13/4 , 1/20 )

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