竖式计算:0.6+1.4= ; 1.25+12.7= ; 6.2﹣3.9= ;4.5+2.3= ; 8.4﹣7.5= ; 1.10﹣0.3= .
7(4-x)=9(x-4) 128-5(2x+3)=73
x×(+)=6x-10=8 8-x=x÷0.24=100
80÷x=2012x+8x-12=28 (2x-1)+10=371.6x+3.4x-x-5=27 (3x+5)÷2=(5x-9)÷3x-21×=4x÷=÷
3x+7x+10=903(x-12)+23=35 7x-8=2x+275x-18=3–2x
x+4=10 x-12=348x=96 4x-30=08.3x-2x=63x÷10=5.2