解方程组:{11x+9y=26 9x+11y=14

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 03:59:57
解方程组:{11x+9y=269x+11y=14解方程组:{11x+9y=269x+11y=14解方程组:{11x+9y=269x+11y=1411x+9y=26(1)9x+11y=14(2)(1)+

解方程组:{11x+9y=26 9x+11y=14
解方程组:{11x+9y=26 9x+11y=14

解方程组:{11x+9y=26 9x+11y=14
11x + 9y = 26 (1)
9x + 11y = 14 (2)
(1) + (2) 得
20x + 20y = 40
x + y = 2
11x + 9(2 - x) = 26
2x = 8
x = 4
y = -2

11x+9y=26……① 9X+11y=14……② ①×9-②×11得40y=-81 Y=-81/40