Friday

August 29, 2014

August 29, 2014

Posted by **briana** on Thursday, February 17, 2011 at 8:17pm.

3x + 7y = −3 (1)

7x + y = −53 (2)

Find the value of x.

(part 2 of 2)Find the value of y.

- algebra 2 -
**Reiny**, Thursday, February 17, 2011 at 8:22pmfor (2)

y = -7x - 53

sub into (1)

3x + 7(-7x-53) = -3

3x - 49x - 371 = -3

-46x = 368

x = -8

sub that back into y = .... to get y

**Related Questions**

biology - Given the part of the molecule shown below, can the underlined atom ...

Math - Went ahead and did the HW the teach recommended but she did not post the ...

Algebra - I just cannot seem to get these two problems. Any help is greatly ...

calculus - Find an equation for the surface consisting of all points P(x, y, z) ...

math - Use linear combinations to solve the system 3x − y = −4 &#...

Math - Find a system of linear equations corresponding to the following ...

physics - Four charges −8 × 10^−9 C at (0 m, 0 m), −7 × 10^&#...

college Algebra - Write the system as a matrix and solve it by Gauss-Jordan ...

algebra help!!!! - Add: b^−3 ca^−1 −xc^−2 how would i do...

Calc. - I am so confused with this last part of the unit! What in the world is ...