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.
Ответ: 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.
Ответ: 4,38.

3)(51,32+x)×0,12=72;
51,32+х= $\frac{72}{0,12}$ ;
x+51,32=600;
x = 548,68.
Ответ: 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.
Ответ: 55,52.