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olchik [2.2K]
2 years ago
15

Find value of x. using geometry

Mathematics
2 answers:
Ronch [10]2 years ago
5 0

Answer:

10.5

Step-by-step explanation:

3x - 9 = x + 12

Subtract x from both sides

2x - 9 = 12

ad 9 to both sides

2x = 21

Divide both sides by 2

x = 10.5

Shtirlitz [24]2 years ago
5 0

Answer:

these \: sides \: are \: equal \: (rhombus) \\ x + 12 = 3x - 9 \\ 2x = 21 \\ x = 10.5

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