解方程:2{3【4(5x-1)-8】-20}-1

问题描述:

解方程:2{3【4(5x-1)-8】-20}-1

原式=2{3[20x-4-8]-20}-1
=2{3[20x-12]-20}-1
=2{60x-36-20}-1
=2{60x-56}-1
=120x-112-1
=120x-113