解方程:96-0.4×=28 2.4-2×=2(×-0.24) 1.1(4×-2)=12.1

问题描述:

解方程:96-0.4×=28 2.4-2×=2(×-0.24) 1.1(4×-2)=12.1

96-0.4x=28 0.4x=96-280.4x=68x=68/0.4x=1702.4-2x=2(x-0.24) 2.4-2x=2x-0.482x+2x=2.4+0.484x=2.88x=2.88/4x=0.721.1(4x-2)=12.14x-2=12.1/1.14x-2=114x=11+24x=13x=13/4