SOLUTION: I have 2 more simultaneous questions that I need help with please. Very confused. Thank you 5x+y=19 2x-y=2 and 6x+7=20 3x+y=11

Question 70955: I have 2 more simultaneous questions that I need help with please. Very confused. Thank you
5x+y=19
2x-y=2
and
6x+7=20
3x+y=11
Answer by mathman409(67) (Show Source): You can put this solution on YOUR website!
5x+y=19
2x-y=2
add the equations to cancel 1 variable out, then figure out the other variable.
5x+y=19
+
2x-y=2
____________
7x=21
x=3
get the other variable using any equation, but this time replace x with the value it has, in this case, 3
15+y=19
y=19-15
y=4
CHECK USING THE OTHER EQUATION (this is a very important step if you want to be good at algebra)(assume your answers are right and use the other equation. replace variables with their assumed correct value. if you have the same number on both sides of the equal sign, than you're correct. if you don't...well, than-- you'll just have to start over again)
2(3)-4=2
6-4=2
2=2
yay we did it!

RELATED QUESTIONS
Can I please have help with this please! Thank You! 1. y=2x^2-12x+19,y=2x-1 2.... (answered by Alan3354,josgarithmetic,ikleyn)

I have to express the following rational expressions in lowest terms Can you please help... (answered by ankor@dixie-net.com)

Hi I need help with adding and subtracting with unlike denominators. I have a couple... (answered by checkley75)

I have a few math questions that I need help with. Can you show me how to do these... (answered by richwmiller,stanbon)

Can you please tell me if i got these correct? Im doing a practice test to study for my... (answered by Edwin McCravy,solver91311)

hello i need help with this problem please!! 3x^3-5x^2-2x thank you paige... (answered by ankor@dixie-net.com)

I need to graph these linear equations the more i try the more i get confussed.... (answered by BrittanyM)

Can you please help me with this? This is simultaneous equation and I need a graphs... (answered by Fombitz,rothauserc)

i need help in this problems find three solutuions of each equation. 1)3x-y=6... (answered by elima)