How did grunge/punk started out?​

With the effects of this movement still relevant some 30 years later, it’s worth exploring how it all began – and how grunge entered the mainstream. It all started with the Melvins. Formed in 1983 in Washington State, the band were part of a generation of musicians influenced by the likes of KISS, Black Sabbath, Led Zeppelin and AC/DC.

Explanation:

if this helped can i please get i only need 1 more :) if not thats ok

they thoght they were going to nuke each other

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13