SOLUTION: I do not understand this at all. I know that I have to substitute the x and y values but I don't know how to solve it. It is solving systems using substitution. One of the problems

Question 255798: I do not understand this at all. I know that I have to substitute the x and y values but I don't know how to solve it. It is solving systems using substitution. One of the problems is: y=3x-10 and the other equation that goes with it is y=2x-5
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
One of the problems is: y=3x-10 and the other equation that goes with it is y=2x-5
:
Given that y = 3x-10, that means that any place you see "y", you can substitute (3x-10)
:
The 2nd equation:
y = 2x - 5
From the 1st equation, substitute (3x - 10) for y
3x - 10 = 2x - 5
3x - 2x = -5 + 10
x = +5
:
Now substitute 5 for x in the 1st equation to find y
y = 2x - 5
y = 2(5) - 5
y = 10 - 5
y = 5
:
Check the solutions by sustituting for x and y in the 2nd equation
y = 2x - 5
5 = 2(5) - 5
5 = 10 - 5
5 = 5; true; confirms our solutions of x = 5 and y = 5
;
:
Did this shed some light on substitution??
RELATED QUESTIONS
I do not understand this at all. I know that I have to substitute the x and y values but... (answered by Greenfinch)

I do not know how am I supposed to answer questions with unknown variables, like maybe... (answered by josgarithmetic,ikleyn)

I don;t get this graphing thing at all! I have to solve the system of linear equations by (answered by ankor@dixie-net.com)

Here�s the problem: For a car renting for $15 per day plus $.10 per mile, the cost for (answered by stanbon)

48 equals a number increased by 6, and the sum,all multiplied by 5.Find X I just don't (answered by solver91311)

{{{((15/x)-5)/(x-3)}}}, simplify with rationalizing and substitute in 3 for x. The answer (answered by josgarithmetic,MathTherapy)

Please Help. I have a textbook and it takes me through the steps on what I need to do,... (answered by Fombitz)

I do not understand this problem... y= Log to the base 2(x+1)-3 I have to graph it. (answered by Alan3354)

Hey there, I have recently been set a simultaneous equations hwk that up till now I have... (answered by Alan3354)