Question

Solve B = –4(c – 2d) for d.

Answer 1

well i can't solve it

Answer 2

sorry i mean i can solve it

Answer 3

See

B = –4(c – 2d)
=> B = -4(c-3d)
=> B = -4c + 12d
=> B + 4c = 12 d
=> d = (B+4c)/12

This is your answer
Satisfied ?