Решите уравнение : 1) 8(x-1,4)=0,56 2) (4,6-x)×19=4,18 3) (51,32+ x)×0,12=72 4) 17,28:(56- x)=36. Created by ПрохожийЧеловек223. matematika-ru

1) 8×(x-1,4)=0,56;8x-11,2=0,56;8x=0,56+11,2;8x=11,76;x==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==4,38.Ответ: 4,38.3)(51,32+x)×0,12=72;51,32+х= ;x+51,32=600;x = 548,68.Ответ: 548,68.4) = 36;17,28=36×(56-x); =56-x;56-x=0,48;-x=0,48-56;-x=-55,52;x=55,52.Ответ: 55,52.

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

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Решите уравнение : 1)
8(x-1,4)=0,56
2) (4,6-x)×19=4,18
3) (51,32+ x)×0,12=72
4) 17,28:(56- x)=36

Answers & Comments

liza1229996 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.

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