Question

5,6(4+х)-3 $\frac{1}{4}$ х , где х=1,8

Answer 1

$5,6(4+х)-3 \frac{1}{4}х = \\ = 5.6(4 + 1.8) - 3.25 \times 1.8 = \\ = 32.48 - 5.85 = 26.63$