geometry/finding values: -21x+2+-12x+13=180

[cpluva]

-21x+2+-12x+13=180

10x-6+3x+5=180

If you can help, thanks!

 

[Deleted member 4993]

Re: geometry/finding values

-21x+2+-12x+13=180

10x-6+3x+5=180

If you can help, thanks!

I cannot figure out what your problem is - do you have any exponent (power) here?

 

[cpluva]

No, there's no exponent. I have to find the value of x and then plug it in to find the measure of an angle.

 

[Deleted member 4993]

Do you know how to solve linear equation say:

find the value of 'x', if

x + 6 + 3x = 90

If not then review quickly from:

http://www.purplemath.com/modules/solvelin.htm

 

[cpluva]

Yes, I do know how to solve linear equations.

EDIT-I think I've got it. Can you check?

-21x+2+-12x+13=180
-33x+15=180
-33x=165
x=-5
-21(-5)+2+-12(-5)+13=180
105+2+60+13=180
107+73=180, 180=180

10x-6+3x+5+3x+5=180
16x+4=180
16x=176
x=11
10(11)-6+3(11)+5+3(11)+5=180
110-6+33+5+33+5=180
104+38+38=180
104+76=180
180=180

I forgot about combining the like terms.