Toán Lớp 6: -7(3x – 5) + 2(7x – 14) = 28
Mik cần gấp ạ
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 6: -7(3x – 5) + 2(7x – 14) = 28
Mik cần gấp ạ
Comments ( 2 )
– 7\left( {3x – 5} \right) + 2\left( {7x – 14} \right) = 28\\
– 21x + 35 + 14x – 28 = 28\\
\left( {14x – 21x} \right) + \left( {35 – 28} \right) = 28\\
– 7x + 7 = 28\\
– 7x = 21\\
x = – 3
\end{array}\]