Question

Помогите плиз дам 34 балла

Answer 1

1)-4х=28
х=28/-4
х=-7
2)7х+3=30-2х
7х+2х=30-3
9х=27
х=27/9
х=3

Answer 2

4,1*7,7+0,86 4,1*7,7=31,57 31,57+0,86=32,43

Answer 3

6ax^2-12ax 6ax(x-2)

Answer 4

Помогите 4 !!!