5x+16-x=-68
Tell whether the giving value of the variable is a solution of the equation.
2007-10-30 02:59:10 · 2 answers · asked by Sunnymorning 2 in Science & Mathematics ➔ Mathematics
5x + 16 - x = - 68
Collect like terms
4x + 16 = - 68
Transpiose 16
4x + 16 - 16 = - 68 - 16
Collect like terms
4x = - 84
Divide both sides of the equation by 4
4x / 4 = - 84 / 4
x = - 84/4
x = - 21
Substitute the x value into the equation
- - - - - - -
Check
5x + 16 - x = - 68
5(- 21) + 16 - (- 21) = - 68
- 105 + 16 + 21 = - 68
Collect like terms
- 105 + 37 = - 68
- 68 = - 68
The variable x = - 21 is a solution for the equation
- - - - - - -s-
2007-10-30 03:20:49 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
I'm not sure of your question. Was a value given for the variable? This equation is solved this way:
5x + 16 - x = -68
5x - x + 16 = -68
4x + 16 = -68
4x = -68 - 16
4x = -84
x = -84/4
x = -21
If -21 was given as the value for x, then yes it is a solution. If any other value was given, then no, it is not a solution.
2007-10-30 10:11:32 · answer #2 · answered by mikeb72654 2 · 0⤊ 0⤋