3/4[4/3(1/2-1/4)-8]=3/2X-5/4 简便计算!

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 22:49:52
3/4[4/3(1/2-1/4)-8]=3/2X-5/4简便计算!3/4[4/3(1/2-1/4)-8]=3/2X-5/4简便计算!3/4[4/3(1/2-1/4)-8]=3/2X-5/4简便计算!【

3/4[4/3(1/2-1/4)-8]=3/2X-5/4 简便计算!
3/4[4/3(1/2-1/4)-8]=3/2X-5/4 简便计算!

3/4[4/3(1/2-1/4)-8]=3/2X-5/4 简便计算!
【解析】 将3/4乘进去消去4/3 就简便了
3/4[4/3(1/2-1/4)-8]=3/2X-5/4
(1/2-1/4)-6=2x/3-5/4
1/4-6=2x/3-5/4
2x/3=1/4+5/4-6
2x/3=-9/2
x=-3
【答案】-3

3/4[4/3(1/2-1/4)-8]=3/2X-5/4
3/4×4/3(1/2-1/4)-3/4×8=3/2X-5/4
(1/2-1/4)-6=3/2X-5/4
1/4-6=3/2X-5/4
3/2X=1/4+5/4-6
3/2X=-9/2
X=-9/2÷3/2
X=-3