how do you do these equations?

matin_hawk · #1 Dec 4, 2004, 06:08 PM

-x+(5-x)=1
and
13-(-2x+)+8
and
3x-7(x-1)=-3(2x+3)

CroCivic91 · Dec 5, 2004, 03:34 AM

-x+(5-x)=1
is equal to
-x+5-x=1
is equal to
5-2x=1
now add 2x to the left and right and you get
5=1+2x
now substract 1 from left and right
2x=4
now divide by 2
x=2
-----
13-(-2x+)+8
you must say what this should be equal to...
-----
3x-7(x-1)=-3(2x+3)
is equal to
3x-7x+7=-6x-9
is equal to
-4x+7=-6x-9
now add 9 to both sides...
-4x+16=-6x
now add 4x to both sides
16=-2x
now divide by -2 and you get
x=-8

Kresho



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!