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vodka [1.7K]
3 years ago
10

If mZDEF= 117°, find the value of x.

Mathematics
1 answer:
Vlad [161]3 years ago
5 0

Answer:

x = 7

Step-by-step explanation:

m<DEF is the sum of m<DEG and m<GEF

12x + 1 + 5x - 3 = 117 add like terms

17x - 2 = 117 add 2 to bot sides

17x = 119 divide both sides by 17

x = 7

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