SOLUTION: 2x + 8y = 80 -2x + 2y = 0

Question 491998: 2x + 8y = 80
-2x + 2y = 0
Found 2 solutions by ptth176, deborabr:
Answer by ptth176(50) (Show Source): You can put this solution on YOUR website!
2x + 8y = 80(1)
-2x + 2y = 0 (2)
(1)+(2)=> 10y=80
=> y=8
(1)=>2x+8x8=80
=>2x+64=80
=>2x=16
=>x=8
Finally: x=8;y=8

Answer by deborabr(181) (Show Source): You can put this solution on YOUR website!
suming the two equations
2x + 8y = 80
-2x + 2y = 0
______________
0x + 10y = 80
y = 80/10
y = 8
substituting y to find x
-2x + 2*8 = 0
-2x + 16 = 0
-2x = -16 multiplying by -1 to change the signal
2x = 16
x = 16/2
x = 8
RELATED QUESTIONS
Anyone know how to graph this? 2x^2 + 2y^2 -12x + 8y -24 =... (answered by rapaljer)
Maximize:Z=40x+88y Subject to:2x+8y≤60... (answered by ikleyn,greenestamps)
Multiply... (answered by checkley75)
Multiply... (answered by x_xxo__oxx_x)
Multiply... (answered by Mathtut)
Solve the system using substitution or elimination: 3x+2y= -12 2x+y= -7 and... (answered by checkley71)
The point (-23, 0) lies on the line -2x + 8y = 46. Determine if this point is a solution... (answered by Edwin McCravy)
The point (-23, 0) lies on the line -2x + 8y = 46. Determine if this point is a solution... (answered by mananth)
Graph x^2 + 2x - 8y + 25 =... (answered by lwsshak3)