Question

初一下数学题、谢谢.给力啊~~已知关于 x,y的方程组 4x-3y=k,2x+3y=5 的解满足x

Answer 1

4x-3y=k ①

2x+3y=5 ②

①-②×2得:

4x-3y-4x-6y=k-10

-9y=k-10

y=-(k-10)/9

①+②得:

4x-3y+2x+3y=k+5

6x=k+5

x=(k+5)/6

因为x