3x-x-5x
=2x-5x
= -3x
-6+0.6b-26b
= -6-25.4b
2(4x-0.5) -3(-6分之1x)
=8x-1+1\2x
=8.5x-1
-3+(2x-2)-(3x+5)
= -3+2x-2-3x-5
= -10-x一题2(4x-0.5)2题-3(-6分之1x)一题2(4x-0.5)=8x-12题-3(-6分之1x)= 0.5x