Question 143503This question is from textbook algebra 1
: How do you find an answer to the question:
3x+y=3
7x+2y=1 This question is from textbook algebra 1
Answer by nabla(475) (Show Source): You can put this solution on YOUR website! The quickest way would be to subtract the first equation from the second giving you a new system:
3x+y=3
4x+y=-2
Now you can repeat that, giving another system:
3x+y=3
x=-5
Now plug the solution for x into the first equation:
3(-5)+y=3 implies y=18
set: (-5,18)
Here is another way to do it:
Solve: We'll use substitution. After moving 1*y to the right, we get: , or . Substitute that
into another equation: and simplify: So, we know that y=18. Since , x=-5.