Solve for x.
a. x = 12
b. x = 72
c. x=64
d. x=18

Hello there, and thank you for posting your question here on .

Short A. x = 12

Why?

This type of angle is called a complementary angle, where two acute angles add up to a 90° angle, (a right angle). Substitute x for 12 in the equation shown. (3 * 12 + 6) Now, do the appropriate math to solve. (3 * 12 = 36) Add. (36 + 6 = 42) To check if this is right, we have to add by the known angle, (48), and make sure it adds up to 90. (42 + 48 = 90) x = 12

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