Solve -5(5+4k)-2k=129

k = -7

Explanation:

−5(5 + 4k) − 2k = 129

Simplify both sides of the equation

−5(5 + 4k) − 2k = 129

(−5)(5) + (−5)(4k) + −2k = 129 (Distribute)

−25 + −20k + −2k = 129

(−20k + −2k) + (−25) = 129 (Combine Like Terms)

−22k + −25 = 129

−22k − 25 = 129

Add 25 to both sides

−22k − 25 + 25 = 129 + 25

−22k = 154

Divide both sides by -22

-22k / -22 = 154 / -22

k = -7

k = -7

Explanation:

−5(5 + 4k) − 2k = 129

−5(5 + 4k) − 2k = 129

(−5)(5) + (−5)(4k) + −2k = 129

−25 + −20k + −2k = 129

(−20k + −2k) + (−25) = 129

−22k + −25 = 129

−22k − 25 = 129

−22k − 25 + 25 = 129 + 25

−22k = 154

 k = -7

i hope this helped! Pls give a thanks (or brainliest if you're feeling nice).

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents