23-a-{10a-[(5a-15)-(4-6a)]}

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/06 17:17:10
23-a-{10a-[(5a-15)-(4-6a)]}

23-a-{10a-[(5a-15)-(4-6a)]}
23-a-{10a-[(5a-15)-(4-6a)]}

23-a-{10a-[(5a-15)-(4-6a)]}
原式=23-a-{10a-[5a-15-4 6a]}
=23-a-{10a-[11a-19]}
=23-a-{10a-11a 19}
=23-a-10a 11a-19
=23-19
=4