If mZDEF= 117°, find the value of x.
1 answer:
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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