SOLUTION: Solve each system by elimination or substitution. 6x

SOLUTION: Solve each system by elimination or substitution. 6x - y = -9 4 + 7x = -y

Question 1001701: Solve each system by elimination or substitution.
6x - y = -9
4 + 7x = -y

Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!

Hi there,
6x - y = -9.......(1)
4 + 7x = -y.......(2)
Sort Equation (2) out
into y = mx + c form
6x - y = -9.......(1)
7x + y = -4.......(2)
Add (1) and (2)
13x = -13
x = -1
Substitute x = -1 into (1)
6x - y = -9
6(-1) - y = -9
-6 - y = -9
-y = -9 + 6
-y = -3
y = 3
{-1,3}
Hope this helps :-)
RELATED QUESTIONS
System of Equations by Substitution Solve each system by substitution. 7x+y=0... (answered by Fombitz)

{6x+y-8=0 {-4x=9-2y solve the linear system by substitution or linear combinations... (answered by ewatrrr)

they are asking me to solve each system by substitution or elimination this is an... (answered by excoastie725)

Solve the system by substitution and elimination method 3x+y=4... (answered by mananth)

solve each system by substitution or elimination -x+y=6... (answered by Boreal)

Using Substitution or Elimination 6x-y=9... (answered by unlockmath)

Using either substitution or elimination of the following system solve 6x+(3�2)y=-12 and... (answered by Alan3354)

Solve each system of equations by using either substitution or elimination.... (answered by Fombitz)

Solve each system by substitution method 1) y=x^2+6x+9 2) x+y=3 (answered by tommyt3rd)