a) \(x\times 1,8 = 72\)
\(x = 72 : 1,8\)
\(x = 40\)
b) \(x\times 0,34 = 1,19 \times 1,02\)
\(x\times 0,34 = 1,2138\)
\(x = 1,2138 : 0,34\)
\(x = 3,57\)
c) \(x\times 1,36 = 4,76 \times 4,08\)
\(x\times 1,36 = 19,4208\)
\(x = 19,4208 : 1,36\)
\(x = 14,28.\)
