813.
2) 4n = -2 + 6n
2 = 6n-4n
2 = 2n
n=1
4) 3x + 7 = x
7 = x - 3x
7 = -2x
x = -7/2
6) -16-m = -2m
2m - m = 16
m = 16
814.
2) 2 - c = 5c + 1
2-1=5c+c
1 = 6c
c = 1/6
4) -3d -10 = 3d - 6
-10+6 = 3d+3d
-4 = 6d
d = -4/6 = -2/3
6) -7-4x = -7x +5
7x-4x = 5+7
3x = 12
x = 12/3 = 4
815.
2) z +4 -3 = 2z
1 = 2z-z
1=z
4) 7-3x = 4x-9
7+9=4x+3x
16 = 7x
x= 16/7
6) 10y - 3 = 5 + 3y
10y-3y = 5+3
7y = 8
y = 8/7