Question

tìm x 

(X - 7,025) x 2,5 = 27,75                                               x - 18,5 x 2,2 = 88,88

Answer 1

\(\left(x-7,025\right)\times2,5=27,75\\ x-7,025=27,75:2,5\\ x-7,025=11,1\\ x=11,1+7,025\\ x=18,125\\ ~~~~~~~~~~~\\ x-18,5\times2,2=88,88\\ x-40,7=88,88\\ x=88,88+40,7\\ x=129,58\)

Answer 2

*) \(\left(x-7,025\right)\times2,5=27,75\)

\(x-7,025=27,75:2,5\)

\(x-7,025=11,1\)

\(x=11,1+7,025\)

\(x=18,125\)

*) \(x-18,5\times2,2=88,88\)

\(x-40,7=88,88\)

\(x=88,88+40,7\)

\(x=129,58\)