X=-4y
3x+2y=20
Substitution
2 answers:
Answer: y= -2; x = 8
Step-by-step explanation:
X=-4y.......equation 1
3x+2y=20......equation 2
Substitute the value of x into equation 2
3 (-4y) + 2y = 20
-12y + 2y = 20
-10y = 20
Divide both sides by -10
y = 20/-10
y = -2
Substitute the value of y into equation 1 to get the value of x
x = - 4(-2)
x = 8
I hope this helps greatly, please mark as brainliest answer.
Answer:
y=-2
x=8
Step-by-step explanation:
Substitute x=-4y into the other equation:
3(-4y)+2y =20
Multiply out the parenthesis:
-12y +2y = 20
-10y =20
Divide on both sides by -10:
y = 20/-10 =-2
Now, knowing y,you can substite it in the previous equation for x:
x = -4(-2)= 8
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