Question

7 класс,решите уравнения

Answer 1

1) 2(x-3y)=0
x=-4-y

x-3y=0
x=-4-y

-4-y-3y=0
x=-4-y

-4-4y=0
x=-4-y

4y=-4
x=-4-y

y=-1
x=-4-1

y=-1
x=-5

2) 4x-3y=14
x=-2-2y

4(-2-2y)-3y=14
x=-2-2y

-8-8y-3y=14
x=-2-2y

-11y=14+8
x=-2-2y

-11y=22
x=-2-2y

y=-22:11
x=-2-2y

y=-2
x=-2-2(-2)

y=-2
x=-2+4

y=-2
x=2

3) x-x+5y-4y=3-2
x=2-4y

y=1
x=2-4y

y=1
x=2-4

y=1
x=-2

Answer 2

Спасибо большое;)