160乘25%-1.3x=17.9 x⼀5-x⼀6=0.4 3(x+2)=40+11 0.3⼀0.5=x+1⼀2x-1 2.5⼀(x—0.5)=25% 1⼀3:0.25=80%:x

2025-02-23 00:47:27
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回答1:

160*25%-1.3x=17.9
1.3x=40-17.9
x=22.1/1.3
x=17