Question

Solve for a.
3a + 15 = -9

Answer 1

`\boxed{ \bold{ \huge{ \boxed{ \sf{a = - 8}}}}}`

Explanation:

`\sf{3a + 15 = - 9}`

Move 15 to right hand side and change its sign

⇒
`\sf{3x = - 9 - 15}`

Calculate

⇒
`\sf{3x = - 24}`

Divide both sides by 3

⇒
`\sf{ (3x)/(3) = ( - 24)/(3) }`

Calculate

⇒
`\sf{x = - 8}`

Hope I helped!

Best regards! :D

Answer 2

-8

Explanation:

isolate the 3a by subtracting 15 from 9 which gives you -24 then divided 3a by -24 which gives you -8