Question

Реши уравнения
240 : Х = 80
280- а = 190
291+ а = 652
70 * Х = 490

Answer 1

240: 3 =80
280- 90 =190
291+ 359 =652
70* 7 =490

Answer 2

240：x=80
x=240:80
x=3
240:3=80
80=80

280-a=190
a=280-190
a=90
280-90=190
190=190

291+a=652
a=652-291
a=361
291+361=652
652=652

70*x=490
x=490:70
x=7
70*7=490
490=490