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 March 27th, 2019, 11:15 AM #1 Banned Camp   Joined: Mar 2019 From: Mumbai Posts: 66 Thanks: 3 Simultaneous equations variant https://en.m.wikipedia.org/wiki/System_of_equations Can we have decimal points for the variables in Simultaneous equations? Example: 3.2x + 2.3y=5.1 4.1x - 3.2y=7.2 Calculate the value of x & y. Thanks & Regards, Prashant S Akerkar March 27th, 2019, 12:14 PM #2 Senior Member   Joined: Oct 2018 From: USA Posts: 102 Thanks: 77 Math Focus: Algebraic Geometry You can use the substitution method in this case. Solving for $y$ in equation 1: $\displaystyle 2.3y = 5.1-3.2x$ $\displaystyle y = \frac{5.1-3.2x}{2.3}$ Now, since we know what $y$ is we can put it into equation 2 and solve for x: $\displaystyle 4.1x - 3.2 \left( \frac{5.1-3.2x}{2.3} \right) = 7.2$ Once $x$ is solved, but that value into the equation for $y$ in terms of $x$ to get $y$ Thanks from topsquark Last edited by Greens; March 27th, 2019 at 12:16 PM. March 27th, 2019, 02:16 PM   #3
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 Originally Posted by prashantak [url] Can we have decimal points for the variables in Simultaneous equations?
YESSSSS!!
Who are you anyway...a math student? March 27th, 2019, 02:50 PM   #4
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 Originally Posted by prashantak Can we have decimal points for the variables in Simultaneous equations?
In theory, the constants used in the equations needn't be integers. If constants such as 3.2 are given, it's desirable that it's clarified whether they should be treated as exact values. The solutions may be quite sensitive to slight errors (such as rounding or truncation errors) in the values of the constants. Tags decimal, equations, point, simultaneous, variant Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post prashantakerkar Algebra 10 May 31st, 2017 01:08 PM baldgeezer Algebra 4 April 19th, 2017 09:45 AM unistu Geometry 3 December 3rd, 2014 10:18 PM bilano99 Algebra 3 June 30th, 2012 06:48 AM prashantakerkar Algebra 5 August 29th, 2011 05:16 AM

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