Asked by asha
i need help with this problem:2x-y=-4
-x-y=5
when you answer this question can you plz include the steps you did to get the final answer?
-x-y=5
when you answer this question can you plz include the steps you did to get the final answer?
Answers
Answered by
Quidditch
A way to solve this type of problem:
First express one of the variables in terms of the other.
-x-y = 5
or, y = -5-x
Now substitute that value for y into the other equation.
2x -(-5-x)=-4
Solve for x, then substitute the known x value into either equation to solve for y.
First express one of the variables in terms of the other.
-x-y = 5
or, y = -5-x
Now substitute that value for y into the other equation.
2x -(-5-x)=-4
Solve for x, then substitute the known x value into either equation to solve for y.
Answered by
drwls
Subtract the second equation from the first.
3x = -9
x = -3
y = -x -5 = -2
3x = -9
x = -3
y = -x -5 = -2
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