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1 answer:
<h3>Answer: (6, -1)</h3>
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Explanation:
If you were to multiply both sides of the second equation by 4, then,
The original system of equations is equivalent to this system
Let's subtract straight down.
- The x terms have the same coefficient (2) out front. This means when we subtract the x terms, they'll go away. 2x-2x = 0x = 0.
- Subtracting the y terms gets us: y-(-20y) = y+20y = 21y
- Subtracting the right hand sides gets us: 11-32 = -21
After those three sets of subtractions are performed, we have this new equation: and that solves to
(divide both sides by 21).
Now use this y value to find x. You can pick any equation with x & y in it.
The solution as an ordered pair is (x,y) = (6, -1)
The two lines cross at this location.
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