2x-30%x=3.4 x-四分之x=75%
问题描述:
2x-30%x=3.4 x-四分之x=75%
答
因为:30%x=0.3x;四分之x=0.25x;75%=0.75
则 2x-0.3x=0.75 =======> x=0.4411
3.4x-0.25x=0.75 =======> x=0.2307
答
(1)
由2x-30%x=3.4可化简得
2x-0.3x=3.4
即1.7x=3.4
解得x=2
(2)
由x-四分之x=75%可化简得
x-0.25x=0.75
即0.75x=0.75
解得x=1