I like that solution better than the one I suggested. Don On Apr 4, 4:45 pm, Dave <dave_and_da...@juno.com> wrote: > @Kumar0746: Technically, you can't solve an _expression_; you can solve an > _equation_, which is a statement of the form expression = expression, which > is what you have. > > Don's suggestion is a good one. Another way is to call the expression on > the left side of the equation f(x) and the expression on the right side of > the equation g(x), and calculate f(0), g(0), f(1), and g(1). Then > > x = (f(0) -g(0)) / (f(0) - g(0) - f(1) + g(1)) > > In the original poster's example, f(0) = 10, f(1) = 8, g(0) = -9, and g(1) > = 1, so x = 19/12. Presuming that you want the exact answer, leave it in > fractional form, and if the denominator is negative, then negate both > numerator and denominator. Then divide both numerator and denominator by > their gcd. Finally, if the denominator is 1, report the numerator as the > answer; otherwise report the fraction numerator/denominator as the answer. > > Dave > > > > > > > > On Thursday, April 4, 2013 11:43:20 AM UTC-5, Don wrote: > > Simplify the expression by evaluating expressions inside parenthesis > > first. Follow the order of evaluation, doing multiplications first and > > then addition and subtraction. It should be possible to reduce any > > expression to the form > > ax+b=0. Then x=-b/a. > > Don > > > On Apr 4, 11:18 am, arun kumar <kumar0...@gmail.com> wrote: > > > Given an expression in the form of a string, solve for x. The highest > > power > > > of x in the expression will be equal to 1. Operators allowed are +, * > > and > > > -. These are all binary operators. So, 2x would be written as 2*x. Every > > > operator will be followed by a single term or a constant. > > > > For example, consider the following equation: > > > > 2*x+5-(4*x-7+(4-2))=10*x-9 Given such an equation, we need to find a > > > solution to x
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