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Yuki888 [10]
3 years ago
5

#4 please help me I don't know how to do this problem

Mathematics
2 answers:
stiks02 [169]3 years ago
6 0
DF=9x-39
DE=47
EF=3x+10
47+3x+10=9x-39
47+10+39=9x-3x
96=6x
16=x
frez [133]3 years ago
6 0
Combine DE and EF together for 47 + 3x + 10 for 57 + 3x
Then combine like terms from both sides, so 57 + 3x = 9x - 39
After your adding and subtracting you should get 96 = 6x
After dividing both sides by 6 to get x by itself, you get 16 = x
Plug 8 in for x into 3(16) + 10 for a final answer of 58.
You can check doing 47+58 = 105 by making sure both sides equal.

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