Question

4(3-4x)+8(x+5)=21-(x-7)​

Answer 1

Объяснение:

12-16х+8х+40=21-х+7

52-8х=28-х

-8х+х=28-52

-7=-24

Х=24/7

Answer 2

Ответ:

24/7

Объяснение:

4(3-4x)+8(x+5)=21-(x-7)

12-16х+8х+40=21-х+7

-16х+8х+х=21+7-12-40

-7х=-24

х=

$\frac{24}{7} = 3 \frac{3}{7}$

Answer 3

To solve the equation 4(3-4x) + 8(x+5) = 21 - (x-7), you can follow these steps:

Step 1: Distribute the constants and variables on both sides of the equation.

4(3) - 4(4x) + 8(x) + 8(5) = 21 - (x) + 7

Step 2: Simplify both sides of the equation by performing the operations within the parentheses and combining like terms.

12 - 16x + 8x + 40 = 21 - x + 7

Step 3: Continue to simplify by combining like terms on both sides of the equation.

12 - 16x + 8x + 40 = 21 - x + 7

-8x + 52 = 21 - x + 7

Step 4: Move the variable terms to one side of the equation and the constant terms to the other side. You can do this by adding 8x and subtracting 21 from both sides.

-8x + 8x + 52 - 21 = 21 - x + 7 - 8x

52 - 21 = 21 - x - 8x + 7

Step 5: Simplify further.

31 = 21 - 9x + 7

Step 6: Combine like terms on both sides.

31 = 28 - 9x + 7

Step 7: Move the constant terms to one side by subtracting 28 from both sides.

31 - 28 = -9x + 7 - 28

3 = -9x - 21

Step 8: Finally, isolate x by dividing both sides by -9.

(-9x - 21)/(-9) = 3/(-9)

x = -1/3

So, the solution to the equation is x = -1/3.