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Citrus2011 [14]
3 years ago
8

This question is really confusing me, it talks about unknown angle problems with Algebra.

Mathematics
2 answers:
ankoles [38]3 years ago
7 0

Answer:

x=20

Step-by-step explanation:

The two angles are complementary angles.  Complementary angles add to 90 degrees

x + 3x+10 = 90

Combine like terms

4x+10 = 90

Subtract 10 from each side

4x+10-10 = 90-10

4x= 80

Divide each side by 4

4x/4 = 80/4

x = 20

Sever21 [200]3 years ago
3 0

Answer:

20

Step-by-step explanation:

The two given and marked angles add up to 90.

A = x

B = 3x + 10

A + B = 90          Substitute for A and B. A and B are just letters I gave things.

x + 3x + 10 = 90        Combine the left

4x + 10 = 90              Subtract 10 from both sides.

4x +10-10 = 90-10     Combine

4x = 80                      Divide by 4

4x/4=80/4

x = 20

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