Question

−7,84r+12+0,7=(8+0,7)−9,84r. 15 БАЛЛОВ

Answer 1

-7,84r + 12 + 0,7 = (8 + 0,7) - 9,84r

-7,84r + 9,84r = 8,7 - 12 - 0,7

2r = -4

r = -2

Answer 2

Alright, let's solve this equation step by step. I'll do my best to guide you through it.

The equation is: $-7.84r + 12 + 0.7 = (8 + 0.7) - 9.84r$.

First, let's simplify both sides of the equation.

On the left side: $-7.84r + 12 + 0.7$

Combine like terms: $-7.84r + 12.7$

On the right side: $(8 + 0.7) - 9.84r$

Combine like terms: $8.7 - 9.84r$

Now, our simplified equation is: $-7.84r + 12.7 = 8.7 - 9.84r$.

Next, let's get all the $r$ terms on one side and the constant terms on the other.

Add $9.84r$ to both sides: $-7.84r + 9.84r + 12.7 = 8.7 - 9.84r + 9.84r$

Simplify: $2r + 12.7 = 8.7$

Now, subtract 12.7 from both sides to isolate $2r$: $2r = 8.7 - 12.7$

Simplify: $2r = -4$

Finally, divide both sides by 2 to solve for $r$: $r = -2$

So, the solution to the equation is $r = -2$. If you have any questions or if there's anything you'd like to clarify, feel free to ask!