A-2b+8=24求4a-8b-7

问题描述:

A-2b+8=24求4a-8b-7

A-2b+8=24
a-2b=16
4a-8b-7
=4(a-2b)-7
=4x16-7
=64-7
=57
祝你学习进步,有不明白的可以追问!谢谢!!

即a-2b=16
两边乘4
4a-8b=64
所以4a-8b-7
=64-7
=57

∵a-2b+8=24
∴a-2b=16
∴4a-8b-7
=4(a-2b)-7
=4×16-7
=64-7
=57
很高兴为您解答,【the 1900】团队为您答题.
请点击下面的【选为满意回答】按钮.

A-2b+8=24
a-2b=24-8
a-2b=16

4a-8b-7
=4(a-2b)-7
=4*16-7
=64-7
=57

不懂可追问,有帮助请采纳,谢谢!