Tuesday

September 16, 2014

September 16, 2014

Posted by **Janet** on Tuesday, October 23, 2012 at 3:02pm.

4x-y=5

4x+4y=-4

- algebra 1 -
**Steve**, Tuesday, October 23, 2012 at 3:23pmsubstitute y=4x-5 into 4x+4y=-4 to get

4x+4(4x-5) = -4

4x+16x-20 = -4

20x = 16

x = 4/5

so, y = -9/5

**Answer this Question**

**Related Questions**

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

Algebra - solve the linear system using substitution 4x - y=5 4x + 4y= -4 Also ...

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

Algebra 2 - 2 questions: 1. Find "a" if (=3,7) is a solution of 2x+ay=26 2. ...

maths - use the substitution method to solve the linear system. 1. 3x=9 -x+2y=9 ...

Algebra 1 - Okay. So I am completely lost with this... Any help would be great! ...

Algebra - I have a few questions I need help with! 1. Solve the system by ...

Algebra help! - 1.) Solve the system by triangularizing the augmented matrix and...

Algebra help needed please!! - I have a few questions I need help with! 1. Solve...

algebra - i need help with these problems (either a solution or how to plug them...