SOLUTION: (y+10)*X=1800
(x+10)*Y = 2000
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Question 102460: (y+10)*X=1800
(x+10)*Y = 2000
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
1.(Y+10)*X=1800
2.(X+10)*Y = 2000
Use one equation to solve for one variable in terms of another and then solve using the second equation. Let's use equation 2 and solve for Y.
Now use equation (1) and substitute for Y
Substitute
Distributive property
Multiply both sides by (X+10)
Distribute and simplify.
Additive inverse of 1800x and 20000.
Divide by 10.
Factor the equation.
and
From equation (2),
For X=-60,
For X=30,
Two solution pairs:
X=-60 and Y=-40
and
X=30 and Y=50
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