Question

{10(x+y)=30+8x{9(x-y)=-49-8 //////решите пж​ Посмотреть ответы TerSe TerSe Ответ: {10(x+y)=30+8x {9(x-y)=-49-8y {10x+10y=30+8x {9x-9y=-49-8y {10x-8x+10y=30 {9x-9y+8y=-49 {2x+10y=30 {9x-y=-49|*10 2x+10y=30 90x-10y=-490 2x+90x=30-490 92x=-460|:92 x=-5 ____ 10*(-5)+10y=30+8*(-5) -50+10y=30-40 10y=-10+50=10y=40:10 4=4 ___ Ответ:(-5;4) я не.дописал у, спасибо за вашу бдительность) vityamath vityamath Ответ: Пошаговое объяснение: 10(x+y)=30+8x 9(x-y)=-49-8 10x+10y=30+8x 9x-9y= -57 2x+10y=30   9x-9y= -57 18x+90y=270 -18x+18y=114 90y+18y=270+114 108y=384 y= 32/9 2x+10y=30   2x+10*32/9=30 2x+320/9=30 2x=30-320/9 2x= -50/9 x=-50/9 / 2 x= -25/9 x= -2 7/9 y=3 5/9 Новые вопросы в Математика За 6 год робітник виготовляє 54 деталі. Скільки деталей виготовить робітник за 9 годин? помогите пожалуйста решить​ разность двух чисел равна 48, причем одно число в 4 раза больше другого. Чему равно большее из чисел? Пожалуйста помогите!!!!!! Очень срочно нужно помогите пожалуйста Спростіть вираз і обчисліть значення виразу 0,13*р+0,47*р,якщо р=0,14 Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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Answer 1

Looks like you're trying to solve a system of linear equations. However, the solution provided is a bit incomplete. Let me guide you through the steps to solve the system of equations correctly:

Given equations:

1. $10(x+y) = 30+8x$
2. $9(x-y) = -49-8$

Step 1: Distribute the coefficients on the left side of the equations:

1. $10x + 10y = 30 + 8x$
2. $9x - 9y = -49 - 8$

Step 2: Combine like terms:

1. $2x + 10y = 30$
2. $9x - 9y = -57$

Step 3: Isolate one variable in either equation. Let's isolate $x$ in the first equation:

$2x = 30 - 10y$ $x = 15 - 5y$

Step 4: Substitute the expression for $x$ into the second equation:

$9(15 - 5y) - 9y = -57$

Step 5: Distribute the $9$ on the left side:

$135 - 45y - 9y = -57$

Step 6: Combine like terms:

$-54y = -192$

Step 7: Solve for $y$:

$y = \frac{-192}{-54} = \frac{32}{9}$

Step 8: Substitute the value of $y$ back into the expression for $x$:

$x = 15 - 5 \cdot \frac{32}{9} = 15 - \frac{160}{9} = \frac{135}{9} - \frac{160}{9} = -\frac{25}{9}$

So, the solution to the system of equations is:

$x = -\frac{25}{9}$ $y = \frac{32}{9}$

Remember to double-check your work to ensure accuracy.