Solve the system using elimination
y = -x
10x + 2y = 40

so first you would subtract the 10x from the one side so the equation now looks like

2y = -10x + 40

y = −5x + 20

im not sure if this is what you mean but this is how i interpreted it.

if right pls/p>

what statement? is there an image?

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)