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8090 [49]
3 years ago
12

Please help me fast

Mathematics
1 answer:
k0ka [10]3 years ago
5 0

Answer:

x = 9

y = 3

z = 3

Step-by-step explanation:

Triangle 1<em> (From the left):</em>

5x + 7x = 13x - 9 (Sum of two interior angles of a triangle  is equals to exterior opposite angle)

Grouping like terms we have:

12x - 13x = - 9

x = 9

Triangle 2<em> (From the left):</em>

30y = 90 (angles at a right angle = 90)

y = 3

Triangle 3<em> (From the left):</em>

<em>15z + 12z + 36 = 39z</em>

36 = 39z - 27z

z = 36/12

z = 3

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