Answer:
x = 19
Step-by-step explanation:
(5x + 4)° + (x - 2)° + (3x + 7)° = 180°
(5x + x + 3x)° + (4 - 2 + 7)° = 180°
9x° + 9° = 180° → ÷9
x + 1 = 20
x = 20 - 1
x = 19
Hi! Did you mean to add a picture to your comment?
Answer:
Step-by-step explanation:
Is called a letter that stands for the number
Answer: 13/15
Step-by-step explanation:
1 2/3 - 4/5
Use LCD or least common denominator:
1 10/15 - 12/15 =
25/15 - 12/15 =
13/15
