解方程∶140x+90(x+1)=480

2025-01-01 09:29:06
推荐回答(3个)
回答1:

140x+90(x+1)=480
140x+90x+90=480
230x+90=480
230x=480-90
230x=390
x=23分之39

回答2:

回答3: