The sum of two numbers is 39 one of these numbers
is the double of the other Find the numbers
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ʟᴇᴛ ᴏɴᴇ ɴᴜᴍʙᴇʀ ʙᴇ x
ᴀɴᴏᴛʜᴇʀ ɴᴜᴍʙᴇʀ = 2x
sᴜᴍ ᴏғ ɴᴜᴍʙᴇʀs = 39
ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ǫᴜᴇsᴛɪᴏɴ
x + 2x = 39
3x = 39
x = 13
2x = 39
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