Answer:
x+115=180 x=65
90+65+y=180 y=25
Step-by-step explanation:
5x-3(x-2)=4
5x-3x+6=4
2x+6=4
2x= 4-6
2x= -2
x = -1
5
1.1
7.2-6.1
2
So!
If the d (discriminant)
d > 0 Then 2 solutions
d = 0 Then 1 solution
d < 0 Then none
36 > 0 so 2 solutions