Question

1)3x+7y=0 2)2x-5=0 3)4x+2=5x 4)3x=0

Answer 1

Ответ:

1)

$3x+7x=0\\10x=0\\x=0:10\\x=0$

Проверка:

$3*0+7*0=0\\0+0=0\\0=0$

2)

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3)

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4)

$3x=0\\x=0:3\\x=0$

Проверка:

$3*0=0\\0=0$

Answer 2

It seems like you've provided a set of equations. Let's go through each one and solve for the variable x or y, as applicable.

1. 3x + 7y = 0: To solve for x in terms of y: 3x = -7y x = (-7y)/3

2. 2x - 5 = 0: To solve for x: 2x = 5 x = 5/2

3. 4x + 2 = 5x: To solve for x: 4x - 5x + 2 = 0 -x + 2 = 0 -x = -2 x = 2

4. 3x = 0: To solve for x: 3x = 0 x = 0

So, the solutions are:

1. x = (-7y)/3
2. x = 5/2
3. x = 2
4. x = 0