问题
解答题
x(1+25%)=30
25%x-20=16.
答案
(1)x(1+25%)=30
1.25x=30
1.25x÷1.25=30÷1.25
x=24;
(2)25%x-20=16
0.25x-20=16
0.25x-20+20=16+20
0.25x=36
0.25x÷0.25=36÷0.25
x=144.
x(1+25%)=30
25%x-20=16.
(1)x(1+25%)=30
1.25x=30
1.25x÷1.25=30÷1.25
x=24;
(2)25%x-20=16
0.25x-20=16
0.25x-20+20=16+20
0.25x=36
0.25x÷0.25=36÷0.25
x=144.