Find the sum.
(-3.4k-7)+(3k+21)=
Thanks!

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

x is variable or an unknown value to find

example:

2x = 5 which means x = 3