"-X-8-X-4" cannot be solved. This is because it is an expression, and expressions can only be reduced into another expression, not solved. In this example, it would reduce to "-2X-12". However, if you substitute -4 for X, you get -4. If the problem read "-X-8-X-4=-4", -4 would be an appropriate solution for X.
x=4 or x=-4
x2 - 4x = 8 x2 - 4x + 4 = 8 + 4 (x - 2)2 = 12 x - 2 = +&- sq. root of 12 x = 2 +&- 2(sq. root of 3)
4
4 x 1 = 4 4 x 2 = 8 4 x 3 = 12 4 x 4 = 16 4 x 5 = 20 4 x 6 = 24 4 x 7 = 28 4 x 8 = 32 4 x 9 = 36 4 x 10 = 40 4 x 11 = 44 4 x 12 = 48 4 x 13 = 52 4 x 14 = 56 8 x 1 = 8 8 x 2 = 16 8 x 3 = 24 8 x 4 = 32 8 x 5 = 40 8 x 6 = 48 8 x 7 = 56 28 x 1 = 28 28 x 2 = 56 lcm of 4, 8, and 28 = 56
y=x+4
The value of a variable is called the solution. You can determine if the solution is correct by solving for the variable by using the Distributive Property, and Inverse Operation. For an example: If x = 8, determine if it is a solution to 1x - 4 = 4 Replace x with 8. 1(8) - 4 = 4 1 * 8 = 8 8 - 4 = 4 4 = 4 Yes. 8 is a solution to the equation
4(x- 8) + 10 = -10
x=4 or x= -2
If: 3x+8-x = 5x-4 Then: x = 4
x-3x = -8 -2x = -8 x = 4
-8
No, it is not.
x=4 y=4
If you mean: y = x+4 and y = 3x+8 then x = -2 and y = 2
2x = 8 Divide both sides by 2: x = 4 So, the solution set is {4}
One solution is 8 x (4 - 3/3) = 8 x (4 - 1) = 8 x 3 = 24 And another, 8 x 3 x (4 - 3) = 8 x 3 x 1 = 24 And a third, (3 + 3) x ( 8 - 4) = 6 x 4 = 24
x+y=-8 2x-y=4 y=-x-8 2x+x+8=4 3x=-4 x=-4/3 -4/3 + y= -8 y = -8 + 4/3 y= -6 2/3