Tuesday

March 31, 2015

March 31, 2015

Posted by **robbie** on Saturday, January 29, 2011 at 9:15pm.

7x-9y=63

9y-7x=-63

- mat/116 -
**Henry**, Saturday, January 29, 2011 at 9:30pm7X - 9Y = 63

-7X + 9Y = -63

m1 = -A/B = -7 / -9 = 7/9.

m2 = 7/9.

m1 = m2 = 7/9.

Threfore, the lines are parallel and

has no solution. Solve the Eqs and

you'll get 0 = 0.

- mat/116 -
**MathMate**, Saturday, January 29, 2011 at 10:02pmPut it in another way, the lines are coincident and parallel, so they are consistent and we have an infinite number of solutions (at every point where the two lines overlap).

Given:

7X-9Y=63

Let t be any real number equal to X, then

X=t

Y=(7t-63)/9

where -∞<t<∞

- mat/116 -
**Henry**, Monday, January 31, 2011 at 12:30pmSo if we multiply the 2nd Eq by -1, we'll notice that the 2 Eqs are exactly identicak.

Thanks!

**Answer this Question**

**Related Questions**

Mat/116 Algebra - Hello I'm having some difficulities learning about the ...

Algebra - Please check my answer. Solve the system of linear equalities ...

Order Pairs Math - Which ordered pair is a solution of the equation y = x – 3...

Math help - 1. Which value is a solution of the equation 5 - 4x = -3 0 2 -3 1/4 ...

Math 116 - Solve by elimination. 3x-6y=4 and 3x-6y=5. Type as an ordered pair.

math need asap - 7r-4s=-7 (7) 4r+7s=61 (4) 49r - 28s = -49 16r + 28s = 244...

math, really need some feedback on this asap. - 7r-4s=-7 (7) 4r+7s=61 (4) 49r...

Algebra - Use substitution to determine whether the ordered pair (– 3, – 2) is a...

Algebra - Use substitution to determine whether the ordered pair (–2, –3) is a ...

mat/116 - can someone help me in determining wether these numbers are a ...