6k + 21 = 3
6k + 21 - 21 = 3 - 21
6k = -18
6k/6 = -18/6
k = -3
A check to make sure this is right:
6(-3) + 21 = 3
-18 + 21 = 3
3 = 3
Yes, this is correct.
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-47 + 6k = 3k - 2Add 47 to each side:6k = 3k +45Subtract 3k from each side:3k = 45Divide each side by 3:k = 15
x = -3
a = 3
273 13+8 = 21 and 13*21 = 273
That would be 90.