SOLUTION: Here is another i do not understand:
-3x+8y=10
5x+6y=80
Here i have to solve each system by using elimination, and check my solution.
Algebra ->
Expressions-with-variables
-> SOLUTION: Here is another i do not understand:
-3x+8y=10
5x+6y=80
Here i have to solve each system by using elimination, and check my solution.
Log On
-3x+8y=10
5x+6y=80
Here i have to solve each system by using elimination, and check my solution. Answer by elima(1433) (Show Source):
You can put this solution on YOUR website! Solving by elimination means you need to eliminate one of the variables to solve for the other.
So lets start by eliminating the x;
-3x+8y=10
5x+6y=80
To eliminate the x we need to make both numbers opposite so they cancel out, so we will need to multiply each equation by the number that does that.
(5)-3x+8y=10
-15x+40y=50 - eq.1
(3)5x+6y=80
15x+18y=240 - eq.2
Now we will add one equation to the other;
-15x+40y=50
15x+18y=240
-------------
58y=290
y=5
Now that we have y, we will plug that into the equation to solve for x;
5x+6(5)=80
5x+30=80
5x=50
x=10
Hope you understand
=)