How to substitute equations for solutions
3x-2y=9
Y=2x-7
2 answers:
First I would rewrite it so all the x's and y's are in the same places
3x-2y=9
-2x+y=-7
Then multiply the bottom one by 2
-4x+2y=-14
Then add the equations
3x-2y=9
+-4x+2y=-14
-------------------
-x=-5 or x=5
The substitute this into one of the original equations to solve for y.
y=2(5)-7
y=3
So your answer is x=5 and y=3 or (5,3)
Hope this helps.
3X-2(2X-7)=9
3X-4X+14=9
-X=-5
X=5
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Step-by-step explanation:
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Answer:
Whre is the question I don't get it
Y-13=4(x-2)
y-13=4x-8
y=4x+5
Both define y, so they are equivalent.
5x-9=2x+6
3x-9=6
3x=15
x=5
Then plug in x into any of the equations
y=2(5)+6
y=10+6
y=16
Final answer: (5,16)