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X+Y=5, 2x-3y=4 solve by elimination and substitution method |
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Answer» Thanks it really helped me By elimination methodx + y =5 ……….(1)2x –3y = 4 ………(2)Multiplying equation (1) by 2, we obtain2x + 2y = 10 ………..(3)2x –3y = 4 ………(2)Subtracting equation (2) from equation (3), we obtain5y = 6y = 6/5Substituting the value in equation (1), we obtainx = 5 - (6/5) = 19/5So our answer is x = 19/5 and y = 6/5By substitution methodx + y =5 ……….(1)subtract y both side we getx = 5 - y ……..,(4)plug the value of x in equation second we get2(5 – y ) – 3y = 4-5y = - 6y = -6/-5 = 6/5Plug the value of y in equation 4 we getx = 5 – 6/5x = 19/5 |
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