Thursday

December 18, 2014

December 18, 2014

Posted by **Lori** on Friday, March 21, 2008 at 6:24pm.

7x+5(-3x-4)=-21-7x

7x+(-15x-20=-7x-21

-8x-20=-7x-21

7 7

-8x-20+7x=-21

-1x-20=-21

20 20

-1x/-1 = -1/-1

x=1

- Algebra HELP! -
**Reiny**, Friday, March 21, 2008 at 6:35pmok, but I am puzzled by your lines such as

7 7 and

20 20

When you show solutions to equations each new line should contain an equal sign separating the left side from the right side.

Inserting such lines as you have interrupts the "flow" of equations from one to the other.

In my class you would have lost a mark for "bad form".

**Answer this Question**

**Related Questions**

Algebra - I need help trying to put the correct vocabulary words when solving ...

math - Solve by elimination 5x+y=2 3x+y=1 This is what I got : 3(5x+y=2) -5(3x+y...

Algebra - I need help trying to put the correct vocabulary words when solving ...

algebra - -15(3+x)=-6x-9 -45-15x=-6x-9 -45-15x+15x=-6x+-15x-9 -45=21x-9 -45=x-9...

Algebra - I'm not sure how to solve these problems. Simplify (3xsquare - 2x)...

Algebra - I don't know how to solve 12x(2)-15x=0 using the quadratic equation ...

Algebra - Solve the equation 3/x^2+15x+56 = 2x/x-7 - x/x-8

algebra - Solve by elimination. 15x+10y=-20 3x+2y=-4

algebra - 15x^2 / 15x+10 simpfly each and exclude the values

algebra - can someone please tell me how to solve these, thanks! 1.2(3b-4)=8b-11...