Question

3(d-12)=7(d-4)-8(d-3)

Answer 1

Usando a distributiva ficará


3d - 36 = 7d - 28 - 8d + 24

4d = + 36 -28+ 24


4d = 32

d = 32/4


d = 8


Espero ter ajudado

Answer 2

3 ( d - 12 ) = 7 ( d - 4 ) - 8 ( d - 3 )

3d - 36 = 7d - 28 - 8d + 24

3d - 7d + 8d = - 28 + 24 + 36

4d = 32

D = 32 / 4

D = 8