x=(5.8/2+3)/2=5.9/2=2.95
2(2x-3)=5.8解:4x-6=5.84x=11.8x=2.95
解:2x-3=5.8÷22x=2.9+3x=5.9÷2x=2.95
2(2x-3)=5.82x-3=2.92x=5.9x=2.95