(5x+1/4)-(2x-1/6)=1-(3-x/12)怎么做?还有1-(0.7+3x/0.8)=(0.3x-1/0.4)-x
问题描述:
(5x+1/4)-(2x-1/6)=1-(3-x/12)怎么做?还有1-(0.7+3x/0.8)=(0.3x-1/0.4)-x
答
(5x+1)/4-(2x-1)/6=1-(3-x)/12两边乘123(5x+1)-2(2x-1)=12-(3-x)3(5x+1)+(3-x)=12+2(2x-1)15x+3+3-x=12+4x-214x+6=4x+1014x-4x=10-610x=4x=4/10=2/5第二题:1-(0.7+3x)÷0.8=(0.3x-1)÷0.4-x1-(0.7+3x)×5/4=(0.3x-...