3k-9=4k+12

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Solution for 3k-9=4k+12 equation:


Simplifying
3k + -9 = 4k + 12

Reorder the terms:
-9 + 3k = 4k + 12

Reorder the terms:
-9 + 3k = 12 + 4k

Solving
-9 + 3k = 12 + 4k

Solving for variable 'k'.

Move all terms containing k to the left, all other terms to the right.

Add '-4k' to each side of the equation.
-9 + 3k + -4k = 12 + 4k + -4k

Combine like terms: 3k + -4k = -1k
-9 + -1k = 12 + 4k + -4k

Combine like terms: 4k + -4k = 0
-9 + -1k = 12 + 0
-9 + -1k = 12

Add '9' to each side of the equation.
-9 + 9 + -1k = 12 + 9

Combine like terms: -9 + 9 = 0
0 + -1k = 12 + 9
-1k = 12 + 9

Combine like terms: 12 + 9 = 21
-1k = 21

Divide each side by '-1'.
k = -21

Simplifying
k = -21

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