解方程
?0.25+25%x=1.5???????? ????x-20%x=40????????????18-150%x=5.5.
网友回答
解:0.25+25%x=1.5??
????0.25x=1.5-0.25
??? 0.25x=1.25
??????? x=1.25÷0.25
??????? x=5??????????
? x-20%x=40??
?? (1-20%)x=40
??? 80%x=40
?????? x=40÷0.8
?????? x=50
???18-150%x=5.5
???? 1.5x=18-5.5
???? 1.5x=12.5
??????? x=12.5÷1.5
????????x=
故