3 (a - 1) + 31 - 11a = 4 ( 2a + 3)

3 ( a - 1 ) + 31 - 11a = 4 ( 2a + 3 )

⇒ 3 ( a - 1 ) + 31 - 11a = 4 ( 2a + 3 )

Opening the brackets and multiplying the terms, We get,

⇒ 3a - 3 + 31 - 11a = 8a + 12

⇒ -8a + 28 = 8a + 12

⇒ 8a + 8a = - 28 - 12

⇒ 16a = 40

Transposing 16 to Right Hand Side, We get,

⇒ a =

⇒ a =

(-1,-0.5)

step-by-step explanation:

b

step-by-step explanation:

the word superfluous means unnecessary