(x+70):(3⼀7x+70)=7⼀4

2025-06-26 22:00:37
推荐回答(1个)
回答1:

(x+70):(3/7x+70)=7/4
4(x+70)=7(3/7x+70)
4x+280=3x+490
4x-3x=490-280
x=210