Решите уравнение : 1) 8(x-1,4)=0,56 2) (4,6-x)×19=4,18 3) (51,32+ x)×0,12=72 4)...

1. 8 × (x — 1,4) = 0,56
8x — 11,2 = 0,56
8x = 0,56 + 11,2
8x = 11,76
x = $\frac{11,76}{8}$ = 1,47

2. (4,6 — x) × 19 = 4,18
87,4 — 19x = 4,18
—19x = 4,18 — 87,4
—19x = —83,22
x = $\frac{-83,22}{-19}$ = 4,38

3. (51,32 + x) × 0,12 = 72
51,32 + x = $\frac{72}{0,12}$
x + 51,32 = 600
x = 548,68

4. $\frac{17,28}{(56 - x)}$ = 36
17,28 = 36 × (56 — x)
$\frac{17,28}{36}$ = 56 — x
56 — x = 0,48
—x = 0,48 — 56
—x = —55,52
x = 55,52