What is the answer to this math problem?

Question

(7-2.1x)3+2(3.5x-6) simplify the expression thank you.

Answer 1

The way to simplify things like that is first to distribute, then add like terms.

Distributing the first becomes

(7-2.1x)3 = 7*3-2.1x*3 = 21-6.3x

You can also do the second one yourself!

Lastly combine the two x terms, and then combine the two number terms to get your result!

Answer 2

Use the distributive property:

(7 - 2.1x)3 + 2(3.5x - 6) = 21 - 6.3x + 7x - 12

Then add like terms:

21 - 6.3x + 7x - 12 = (7x - 6.3x) + (21 - 12) = 0.7x + 9

Answer 3

distribute both sides

so

21-6.3x + 7x-12 then to simplify even more you have to combine like terms

9+ .7x

Answer 4

x= 2.48 (rounded)