已知方程4X+2M=3X+1和方程3X+2M=5X+2的解相同,求M的值

问题描述:

已知方程4X+2M=3X+1和方程3X+2M=5X+2的解相同,求M的值

4X+2M=3X+13X+2M=5X+2
4X-3X=1-2M 3X-5X=2-2M
X=1-2M-2X=2-2M
X=(2-2M)/(-2)
1-2M=(2-2M)/(-2)
两边乘以-2得:-2+4M=2-2M
4M+2M=2+2
6M=4
M=2/3