问题
解答题
解方程:
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答案
(1)
=x 0.7
,4 3.5
3.5x=0.7×4,
3.5x÷3.5=2.8÷3.5,
x=0.8;
(2)0.75X-14.5×3=0,
0.75X-43.5+43.5=0+43.5,
0.75x÷0.75=43.5÷0.75,
x=6.8;
(3)X+60%X=28,
160%x=28,
160%x÷160%=28÷160%,
x=17.5.
解方程:
|
(1)
=x 0.7
,4 3.5
3.5x=0.7×4,
3.5x÷3.5=2.8÷3.5,
x=0.8;
(2)0.75X-14.5×3=0,
0.75X-43.5+43.5=0+43.5,
0.75x÷0.75=43.5÷0.75,
x=6.8;
(3)X+60%X=28,
160%x=28,
160%x÷160%=28÷160%,
x=17.5.