Question

20-11=80-8y 11y+9=10y+4

Answer 1

Ответ:

Пошаговое объяснение:

1) 20 - 11 = 80 - 8y

9 = 80 - 8y

9 - 80 = - 8y

- 71 = - 8y

y = - 71 / -8 = 8,875

2) 11y + 9 = 10y + 4

11y - 10y = 4 - 9

y = - 5

Answer 2

Let's solve the two equations step by step:

1. 20 - 11 = 80 - 8y

First, simplify both sides of the equation:

9 = 80 - 8y

Now, isolate the variable "y" by moving the constant term (9) to the other side of the equation:

80 - 9 = 8y

71 = 8y

Now, divide both sides by 8 to solve for "y":

71/8 = y

So, y = 8.875.

2. 11y + 9 = 10y + 4

First, subtract 10y from both sides to isolate the variable "y":

11y - 10y + 9 = 4

Now, simplify:

y + 9 = 4

Subtract 9 from both sides to solve for "y":

y = 4 - 9

y = -5

So, the solution to the second equation is y = -5.

Therefore, the solutions to the two equations are:

1. y = 8.875
2. y = -5