Answer:
x = 129
Step-by-step explanation:
x and 51 are same- side exterior angles and supplementary, thus
x = 180 - 51 = 129
The answer is 6.82
2 + 4 = 6
.05 + .77 = .82
6 + .82 = 6.82
9x + 25 + 3x = 34 + 54
9x + 3x = 12x
34 + 54 = 88
12x + 25 = 88
- 25 - 25
12x = 63
<em><u>x = 5.25</u></em>
