Quizzes & Puzzles0 min ago
how to solve simultaneous equations using a graph
5 Answers
2x+3y=6
2x-y=-10
2x-y=-10
Answers
Best Answer
No best answer has yet been selected by gunning. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.You are being asked to plot these 2 equations on a piece of graph paper, presumably as homework. Where the lines cross each other gives the value of X and Y that solves the equation. Run the axes from -5 to +5 (at least) for both X and Y, just in case the solution involves a negative number (it does).
2x + 3y = 6 solve using zero for x to find point on y axis:
0 + 3y = 6 then y = 6 / 3 or y = 2
if x = 0 then y = 2
similarly when y = o then x = 3 . . . right?
Draw a line from 2 on the y axis to 3 on the x axis
Using the same technique plot 2x - y = -10:
Solution for x and y is where lines cross . . .
. . . that's my guess?
0 + 3y = 6 then y = 6 / 3 or y = 2
if x = 0 then y = 2
similarly when y = o then x = 3 . . . right?
Draw a line from 2 on the y axis to 3 on the x axis
Using the same technique plot 2x - y = -10:
Solution for x and y is where lines cross . . .
. . . that's my guess?
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