12x - 4 = 7x - 21 12x -7x = -21 + 4 5x = -17 x = -3.4
If you mean: 7x+21 = 105 Then the solution is: x = 12
28
y=mx+b 7x+3y=21 3y=21-7x *****_ y=7-2.3x *****_ m= -2.3 negative
x-3-7x=21 -6x=21+3 6x=-24 x=-4
12x - 4 = 7x - 21 12x -7x = -21 + 4 5x = -17 x = -3.4
If: 3x-3 = 7x+21 Then: x = -6
7x - 56 and that is as far as you can go.
If you mean: 7x+21 = 105 Then the solution is: x = 12
28
-21-4x=9-7x 7x-4x=9+21 3x=30 x=30 / 3 therefore x=10
If the equation is 7x - 3y = 21 then (3, 0) and (0, -7).
y=mx+b 7x+3y=21 3y=21-7x *****_ y=7-2.3x *****_ m= -2.3 negative
x-3-7x=21 -6x=21+3 6x=-24 x=-4
11x - 21 = 7x + 3 4x = 24x = 6
-3x=-21+4x-3x-4x=-21+4x-4x-7x=-217x=217x/7=21/7x=3
7x