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Anonymous
Add 17 to each side and collect like terms:
2k = 17 + 4 - 21k - 6 ie 2k = 15 - 21k
so 23k = 15 which suggests that you may have mistyped your question.
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How do you solve 4y plus x equals 8
121 is the answer
Not enough information to solve
a equals 5
9 x 27 equals 243