Answer:simply
Step-by-step explanation:
Simplifying
-3.4k + -7 + 3k + 21 = 0
Reorder the terms:
-7 + 21 + -3.4k + 3k = 0
Combine like terms: -7 + 21 = 14
14 + -3.4k + 3k = 0
Combine like terms: -3.4k + 3k = -0.4k
14 + -0.4k = 0
Solving
14 + -0.4k = 0
Solving for variable 'k'.
Move all terms containing k to the left, all other terms to the right.
Add '-14' to each side of the equation.
14 + -14 + -0.4k = 0 + -14
Combine like terms: 14 + -14 = 0
0 + -0.4k = 0 + -14
-0.4k = 0 + -14
Combine like terms: 0 + -14 = -14
-0.4k = -14
Divide each side by '-0.4'.
k = 35
Simplifying
k = 35
