Saturday

December 20, 2014

December 20, 2014

Posted by **Mia** on Tuesday, March 2, 2010 at 1:04pm.

y-x=4

x-y=3

Thank you!

- Linear Equations -
**Reiny**, Tuesday, March 2, 2010 at 4:14pmHere is why there is no solution ...

multiply the first equation by -1

x - y = -4

subtract the second equation ...

0 = -7 >>>> CONTRADICTION! So, no solution.

OR

by substitution,

first equation: y = x+4

sub into second

x-y = 3

x - (x+4) = 3

x-x-4=3

0 = 7, same result.

Your answer of x = y = 7/2 does not work in either equation.

- Linear Equations -
**megan**, Thursday, June 30, 2011 at 10:22amSolve the following system of equations by the substitution method.

8x = 2y + 5

3x = y + 7

- Linear Equations -
**jessica**, Saturday, February 16, 2013 at 6:06amY-X=4...(EQN 1)

X-Y=3...(EQN 2)

MAKING X THE SUBJECT IN EQN 2

X=3+Y

SUBSTITUTING IN EQN 1

Y-(3+Y)=4

Y-3-Y=4

THE Y GETS ELIMINATED,HENCE THERE IS NO SOLUTION

**Answer this Question**

**Related Questions**

Substitution Method-Plz help - Use the Substitution method to solve the system ...

Algebra - Solve the system of linear equations using the substitution method. 3x...

Algebra II - How do you solve the linear equations x+y=5 3x-y=3 by use of the ...

Geometry :( - this maths problem is wrecking my head.... 1.find the points of ...

Algebra - solving linear equations w/ substitution - The question in the book ...

Substitution Method - Use the Substitution method to solve the system of ...

calc - correction: 9/25(u+7)u^11 du = 9/25(u^12 + 7 u^11) du and you can easily ...

Algebra - Solving system of linear equations by using the apropiate method name ...

Pre-Calc - Solve the system of equations using either the substitution method or...

Algebra - Solve the system of equations using substitution. x + 4y = -5 3x - 8y...