$3n+9n=-2(7-4n)-(1+n)\\\\\mathrm{Add\:similar\:elements:}\:3n+9n=12n\\\\12n=-2\left(7-4n\right)-\left(1+n\right)\\\\\mathrm{Expand\:}-2\left(7-4n\right)-\left(1+n\right):\quad 7n-15\\\\12n=7n-15\\\\\mathrm{Subtract\:}7n\mathrm{\:from\:both\:sides}\\\\12n-7n=7n-15-7n\\\\Simplify\\\\5n=-15\\\\\mathrm{Divide\:both\:sides\:by\:}5\\\\\frac{5n}{5}=\frac{-15}{5}\\\\Simplify\\\\n=-3$

6 0

3 years ago

Read 2 more answers

You received $112 in all selling paintings. You sold one painting for $27

Contact [7]

Answer:

Step-by-step explanation:

17x = 85

17x/17 = 85/17

x = 5

3 0

3 years ago

Show work, please! its due today

Vera_Pavlovna [14]

Answer:

grandpa is 65 and junior is 13

Step-by-step explanation:

if you divide 78 by 6, you get 13 (juniors age) and 78 minus 13 is 65

hope this helps:)

6 0

3 years ago

What expression would be equivalent to 4+12? 6(8+6) 12(4+1) 4(44+3) 8(6+4)

Paladinen [302]

Answer:

12(4+1) i think

Step-by-step explanation:

6 0

4 years ago