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x=y+3 4 = 3x – 2y It’s substitution but I don’t know how to do it
Question
x=y+3
4 = 3x – 2y
It’s substitution but I don’t know how to do it
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Mathematics
4 years
2021-08-09T17:10:15+00:00
2021-08-09T17:10:15+00:00 2 Answers
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Answers ( )
x= -2, y= -5
plug x=y+3 into the second equation
4= 3(y+3) -2y
solve for y
4= 3y+9 -2y
4=y+9
y= -5
plug y= -5 into either equation to get x
x= -5+3
x=-2
Answer:
4= 3(y+3) – 2y (substitute the given x-value into the equation to solve for y)
4= 3y+9-2y (use the distributive property)
4=y+9 (combine like terms)
y= -5 (subtract 9 from both sides to isolate the y-term)
plug it in
x= (-5)+3
x=-2
(-2,-5)