4x+3*0.7=6.54x+2.1=6.54x=4.4x=1.1
x/4+15-x/8=20;x/8=5;x=40;您好,很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,如果满意记得采纳如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。祝学习进步
4X+2.1=6.54X=6.5-2.14X=4.4X=1.1
4X+3乘0.7=6.54X+2.1=6.54X=6.5-2.14X=4.4X=1.1