Solve the system by the addtion method,and identify the value of y of the solution.

分类: 作业答案 • 2022-02-26 10:55:01

问题描述：

Solve the system by the addtion method,and identify the value of y of the solution.
3x - y = 5
5x + 3y = -1

答

8x+2y=4
4x+y=2
7x=7
x=1
y=-2