21.
3x+7=37 -7 -7 3x=30 /3 /3 x=10
3x+7=4x 7=4x-3x 7=x
3x - 7 = 2 3x = 9 x = 3
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
3x = 7-4x 3x+4x = 7 7x = 7 x = 1
if 3x+7 = 3 then 3x = 3-7 3x = -4 then, x = -4/3
7-3x = -4x + 13x = 6
3x + 2y = 7
3x + 4= 7 3x= 7-4 3x/3 = 3/3 x=1
If: 3x+7 = -14 Then: x = -7
5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -
3x = 18divide both sides by 3x = 6