Answer:
80
Step-by-step explanation:
every triangle adds up to 180 sort of, in this case, turn 4 into 40. 40+20=60 so add 80 to be 180!!!
How can Omg why am so dump
x+y=-10
x-y=-2
1. 6(2y + 1)
2. 4(4k+6)
3. 4r
4. 18x+24