c) x . (2,8 + 5,2) = 48 x . 8 = 48 x = 48 : 8 x = 6 d) x . (12,25 - 1 _ 2,75) = 1050 x . 14 = 1050 x = 1050 : 14 = 75
c) \(x\times2,8+x\times5,2=48\)
\(x\times\left(2,8+5,2\right)=48\)
\(x\times8=48\)
\(x=6\)
d) \(x\times12,25-x+x\times2,75=1050\)
\(x\times\left(12,25-1+2,75\right)=1050\\ x\times14=1050\\ x=75\)