解下列方程.3-2（m-3)=5m+1 3(y-10)-2(y+15)=0

分类: 作业答案 • 2022-01-09 18:01:33

问题描述：

答

3 - 2(m - 3) = 5m + 1
3 - 2m + 6 = 5m + 1
5m + 2m = 3 + 6 - 1
7m = 8
m = 8/7
3(y -10) - 2(y + 15) = 0
3y - 30 - 2y - 30 = 0
3y - 2y = 30 + 30
y = 60