Answer:
x=4
Step-by-step explanation:
8×4=12°
20×4=80°
17×4=64
12+80+64=180
8x+20x+17x=180
add all together,
20+8=28+17=45
180/45=4
your answer is 4
to check sub x for 4
8x4=32
20x4=80
17x4=68
68+32=100
100+80=180
X=4
