Question

решите уравнения!!!!!!!!!!!!​

Answer 1

$3x = 1200 + 7800$

$3x = 9000$

$x = 3000$

2)

$x +2958 = 139 \times 57$

х=7923-2958=4965

Answer 2

1)3х-7800=1200

3х=1200+7800

х=9000|:3

х=3000

Проверка:

х=3000

3×3000-7800=1200

1200=1200

2)(k+2958):57=139