\(\frac{x+140}{x+260}=71+65,4\)
\(\frac{x+140}{x+260}=136,4\)
\(\Rightarrow\)\(x+140=\left(x+260\right).136,4\)
\(\Rightarrow x+140=136,4x+35464\)
\(\Rightarrow x-136,4x=35464-140\)
\(\Rightarrow-135,4x=35324\)
\(\Rightarrow x=....\)
Đúng 0
Bình luận (0)
