Question

2) z + 4 - 3 = 2z;4) 7 - 3x = 4x – 9;6) 10y - 3 = 5 + 3y.​

Answer 1

Ответ:

Пошаговое объяснение:

2) z + 4 - 3 = 2z;

2z - z = 4 - 3

z = 1

4) 7 - 3x = 4x – 9;

4x + 3x = 7 + 9

7x = 16

x = 16:7

x = 2 2/7

6) 10y - 3 = 5 + 3y.​

10y - 3y = 5 + 3

7y = 8

y = 8:7

y = 1 1/7

Answer 2

Ответ:

Пошаговое объяснение:

2) z+4-3=2z

z+1=2z

чтобы избавиться от z слева

(z+1)-z=(2z)-z;

1=z или z=1

4) 7-3*x=4x-9

прибавляем 3x слева и справа

(7-3x)+3x=4x-9+3x

7=7x-9; прибавляем 9 к обоим частям

16=7x => x=16/7

6) 10y-3=5+3y

Вычтем 3y слева и справа

10y-3-3y=5+3y-3y

7y-3=5

7y=8

y=8/7

Answer 3

Sure, I can help solve these equations for you. Let's go through each of them step by step.

2) z + 4 - 3 = 2z

First, simplify the left-hand side:

$z + 4 - 3 = z + 1$

Now, the equation becomes:

$z + 1 = 2z$

To isolate $z$, we can subtract $z$ from both sides:

$1 = 2z - z$ $1 = z$

So, $z = 1$.

4) 7 - 3x = 4x - 9

First, let's isolate $x$ on one side of the equation. Add $3x$ to both sides:

$7 = 4x - 9 + 3x$ $7 = 7x - 9$

Now, add $9$ to both sides:

$7 + 9 = 7x$ $16 = 7x$

Now, isolate $x$ by dividing both sides by $7$:

$x = \frac{16}{7}$

6) 10y - 3 = 5 + 3y

First, let's isolate $y$ on one side of the equation. Subtract $3y$ from both sides:

$10y - 3 - 3y = 5$ $7y - 3 = 5$

Now, add $3$ to both sides:

$7y - 3 + 3 = 5 + 3$ $7y = 8$

Now, isolate $y$ by dividing both sides by $7$:

$y = \frac{8}{7}$