Question

25y + 75y=800
x×10=7890-800



помогите пж пж срочно надо надо надо​

Answer 1

Пошаговое объяснение:

$25y + 75y = 800$

$100y = 800$

$\frac{100y}{100} = \frac{800}{100}$

$y = \frac{800}{100}$

$\frac{800}{100} = \frac{100 \times 8}{100 \times 1} = \frac{100}{100} \times 8 = 8$

$y = 8$

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$x \times 10 = 7890 - 800$

$10x = 7090$

$\frac{10x}{10} = \frac{7090}{10}$

$x = \frac{7090}{10}$

$\frac{7090}{10} = \frac{10 \times 709}{10 \times 1} = \frac{10}{10} \times 709 = 709$

$x = 709$