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leonid [27]
3 years ago
11

TIMED!!!

Mathematics
2 answers:
Katen [24]3 years ago
6 0
Answer:
x = 50
y = 10

Explanation:
When two lines intersect, four angles are formed. A theorem states that each two vertically opposite angles are equal.

Applying this on the given, we would find that:
1) 3y and x-20 are vertically opposite angles. This means that:
3y = x - 20
This can be rewritten as:
x = 3y + 20 ........> equation I
2) y+140 and 5x-100 are vertically opposite angles. This means that:
y + 140 = 5x - 100 ..............> equation II

Substitute with I in II and solve for y as follows:
y + 140 = 5x - 100
y + 140 = 5(3y+20) - 100
y + 140 = 15y + 100 - 100
15y - y = 140
14y = 140
y = 10

Substitute with the value of y in equation I to get x as follows:
x = 3y + 20
x = 3(14) + 20
x = 50

Hope this helps :)
valkas [14]3 years ago
3 0
X - 20 + 5x - 100 = 180
6x - 120 = 180
6x = 300
  x = 50

3y = x - 20
3y = 50 -20
3y = 30
y = 10

answer
C. x = 50 and y = 10


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