a) \(\left(x+574\right)\times87=57246\)
\(x+574=57246:87\)
\(x+574=658\)
\(x=658-574\)
\(x=84\)
b) \(1752:x\times69=10074\)
\(1752:x=10074:69\)
\(1752:x=146\)
\(x=1752:146\)
\(x=12\)
\(a.\) \(\left(x+574\right)\times87=57246\)
\(x+574=57246:87\)
\(x+574=658\)
\(x=658-574\)
\(x=84\)
\(b.\) \(1752:x\times69=10074\)
\(1752:x=10074:69\)
\(1752:x=146\)
\(x=1752:146\)
\(x=12\)