You add or subtract some quantity on both sides of the equation, so that you only have "x" on one side of the equation. Example:
4x + 3 = 2x - 5
Subtract 2x on each side, this leaves you:
4x - 2x + 3 = 2x - 2x -5
2x + 3 = -5
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3 - x = 12x - 1 Add x to both sides of the equation: 3 = 13x - 1 Add 1 to both sides of the equation: 4 = 13x Divide both sides of the equation by 13: 4/13 = X
To solve for y in terms of x, divide both sides of the equation by 2: y = x/2.If x=2y then you have already solved for x.
To solve the equation f(x) = 2x-5, set f(x) equal to zero and solve for x. In this case, you have 2x-5 = 0. Add 5 to both sides of the equation to isolate the x term, giving you 2x = 5. Finally, divide both sides by 2 to solve for x, which gives x = 5/2 or x = 2.5.
Solve and answer for X is a phrase used mostly in Algebra. In Algebra, a person can find the answer for X by doing the same thing to both sides of the equation. For example, X + 5 = 10. If a person subtracts the 5 from both sides, they will get the answer of X = 5.
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