SOLUTION: What is the formula to the substitution method?
y=2x
2x+y= -12
Algebra.Com
Question 181097: What is the formula to the substitution method?
y=2x
2x+y= -12
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
y=2x.........eq 1
2x+y= -12....eq 2
:
again there is no formula. In substitution you are take on equation and isolated either variable and then placing the value of that varible into the other equation. In our case, eq 1 , y is already isolated and its value is 2x. We plug that into all occurences of y in eq 2
:
2x+(2x)=-12
:
4x=-12
:
:
now take x's found value and plug it back into either equation. in this instance eq 1 is much easier to work with
:
y=2(-3)
:
:
solution(-3,-6)
RELATED QUESTIONS
What is the answer to solve by the substitution method
7x + 7y = 0
-2x + y = 6 (answered by richwmiller)
What is the answer to x+2y=10
2x-y=5? using the... (answered by MathLover1,Pinksparkles)
using the substitution method what is the answer to this equation?
y=2x-1... (answered by Alan3354)
hello,
with the substitution method, how to solve:
x = y + 5
2x - 2y = 12
thank... (answered by Cintchr)
Use the substitution method to solve
2x+4y=12... (answered by Alan3354)
what is the substitution method of y=2x-1 and... (answered by Alan3354)
what is the substitution method of x+y=-2 and... (answered by ptaylor)
For what value of b will the line y=-2x+b be tangent to the parabola y=3x^2+4x-1
a... (answered by Fombitz)
What is the answer to this equation using the substitution method?
y=2x^2+2... (answered by lynnlo)