Answer:
Step-by-step explanation:
Equation
12x + (8x + 5) + 15x = 180 All triangles have 180o for their interior angles.
12x + 8x + 5 + 15x = 180 Combine like terms on the left
35x + 5 = 180 Subtract 5 from both sides
<u> - 5 -5</u>
35x =175 Divide by 35
x = 5
It's not clear what you want. x = 5 is one possibility
12x = 60
15x = 75
8x+5=45
is another possiblity
12x+15x+8x+5=180 degree(being sum of interior angles of a triangle)
35x=180-5
x=175/35
x=5
-2/5, -1/2, -1, -4/3
ah, those are systems you want one variable to cancel out. I would time the bottom equation by -1 so x cancels then u solve for y. then u plug all back in to solve for x.
(3/4) -(1/4)i
Your answer is correct.
