Предмет: Математика, автор: veronica44

помогите решить уравнения

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Ответы

Автор ответа: Виктор4523

1

879-a=405;
a=879-405;
a=474.

y*4=720;
y=720:4;
y=180.

580:x=20;
x=580:20;
x=29.

c+30=123;
c=123-30;
c=93;

820-a=157;
a=820-157;
a=663.

c*4=640;
c=640:4;
c=160

Автор ответа: Лизок031

1

879-a=404
a=879-404
a=475
879-475=404
Ответ: a=475

y×4=720
y=720:4
y=180
180×4=720
Ответ: y=180

580:x=20
x=580:20
x=29
580:x=20
Ответ: x=29

c+30=123
c=123-30
c=93
93+30=123
Ответ: c=93

820-a=150
a=820-150
a=670
820-670=150
Ответ: a=670

c×4=640
c=640:4
c=160
160×4=640
Ответ: c=160

Вроде всё)

Лизок031: 879-a=405
a=879-405
a=474
879-475=405
Ответ: a=474

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