Question

5x+7(3-x)=3(5-2x)-6​

Answer 1

Ответ:

$5x + 21 - 7x = 15 - 6x - 6 \\ 5x - 7x + 6x = 15 - 6 - 21 \\ 4x =- 12 \\ x =- 12 \div 4 \\ x = -3$

Answer 2

Let's solve the equation step by step:

5x + 7(3 - x) = 3(5 - 2x) - 6

First, we simplify both sides of the equation:

5x + 21 - 7x = 15 - 6x - 6

Combine like terms on each side:

-2x + 21 = 15 - 6x - 6

Next, we simplify further:

-2x + 21 = 9 - 6x

To isolate the x terms on one side, let's add 6x to both sides:

-2x + 6x + 21 = 9 - 6x + 6x

This simplifies to:

4x + 21 = 9

Next, subtract 21 from both sides:

4x + 21 - 21 = 9 - 21

This simplifies to:

4x = -12

Finally, divide both sides by 4 to solve for x:

(4x)/4 = (-12)/4

The equation becomes:

x = -3

So, the solution to the equation is x = -3.