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natka813 [3]
3 years ago
12

Please help, see pic attachment

Mathematics
1 answer:
S_A_V [24]3 years ago
6 0

Answer:

the answer is 30

Step-by-step explanation:

because it is an equilateral triangle all sides are the same so if you set 3x+15 equal to 7x-5 and solve for x you get 4x=20 and x= 5

when you plug 5 in to each equation you get 30 for both sides and so it proves that the answer is 30

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