What is 6(d-6f)-6f-3(-7f+8d) ?

The solution to 6(d-6f)-6f-3(-7f+8d) is -18d-21f

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simplify 6(d-6f)-6f-3(-7f+8d)

simplify

6 (d - 6 f) - 6 f - 3 (- 7 f + 8 d)

- 18 d - 21 f

Solution steps

6 (d - 6 f) - 6 f - 3 (- 7 f + 8 d)

Expand

6 (d - 6 f) : 6 d - 36 f

= 6 d - 36 f - 6 f - 3 (- 7 f + 8 d)

Expand

- 3 (- 7 f + 8 d) : 21 f - 24 d

= 6 d - 36 f - 6 f + 21 f - 24 d

Add similar elements:

- 36 f - 6 f + 21 f = - 21 f

= 6 d - 21 f - 24 d

Group like terms

= 6 d - 24 d - 21 f

Add similar elements:

6 d - 24 d = - 18 d

= - 18 d - 21 f

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