Complementary angles 2

Two complementary angles are (x+4) and (2x - 7). Find the value of x.

Correct answer:

x =  31

Step-by-step explanation:

(x+4) + (2x - 7) = 90

(x+4) + (2·x - 7) = 90

3x = 93

x = 93/3 = 31

x = 31

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