Question

X•9=130+140 x•9=270 x=270:9 x=30 30•9=130+140 270=270

Answer 1

Ответ:

$x \times 9 = 130 + 140 \\ 9x = 130 + 140 \\ 9x = 270 \\ x = 30 \\ 30 \times 9 = 130 + 140$

Answer 2

It looks like you've performed the calculations correctly!

You started with the equation $x \cdot 9 = 130 + 140$ and solved for $x$ as follows:

$x \cdot 9 = 270$

$x = \frac{270}{9} = 30$

Then, you checked your solution by substituting $x = 30$ back into the original equation:

$30 \cdot 9 = 130 + 140$

$270 = 270$

This confirms that $x = 30$ is the correct solution to the equation. Well done! If you have any further questions, please, let me know.