Using the figure and the properties of triangles, find the value of x. A. X = 48
B. x = 17
C. x = 18
D. x = 31

x = 18

Step-by-step explanation:

( all traingles have an interior angle that adds up to 180 degree )

equation:

45 + 87 + 3x - 6 = 180

combine like terms:

126 + 3x = 180

subtract 126 from each side:

126 - 126 + 3x = 180 - 126

3x = 54

divide each side by 3:

x = 18

to check, substitute x for 18, both sides of the equation should match

45 + 87 + 3x - 6 = 180

45 + 87 + 3 (18) - 6

180 = 180

step-by-step explanation:

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