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13. 4n - 40 = 7(-2n + 2)

14. 7(5a - 4) - 1 = 14 - 8a

15. -31 - 4x = -5 - 5(1 + 5x)

16. 38 + 7k = 8(k + 4)


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Answer :

craigc456
13)4n-40=-14n+14
=4n+14n=14+40
=18n=54
n=54/18
n=3

14)35a-28-1=14-8a
35a+8a=14+29
43a=43
a=43/43
a=1

15)-31-4x=-5-5-25x
-4x+25x=-10+31
21x=21
x=21/21
x=1

16)38+7k=8k+32
7k-8k=32-38
-k=-8
k=-8/-1
k=8

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