Answer:
LCM means Lowest Common Multiple
GCF means Greatest Common Factor
x = 20
Step-by-step explanation:
x° + 2x° + (x+10)° = 90°
3x° + x° + 10° = 90°
4x° + 10° = 90°
4x° = 90°-10°
4x° = 80°
x = 80/4
Answer: c
add them togethr then subract the diffrece to get x
C
