Question

Фигурная скобка а+в=5 3а-5в=-1. Решите пожалуйста

Answer 1

Система уравнений:
a+b= 5
3a-5b= -1

Выразим из первого уравнения а:
а=5-b
Подставим во второе уравнение:
3 *(5-b) -5b=-1
15-3b-5b=-1
-8b=-1-15
-8b=-16
b= (-16)/ (-8)
b= 2
a= 5-2 =3

Проверим:
2+3=5
3*3-5*2 =9-10=-1

Ответ: а=3 ; b=2.

Answer 2

Solution for the Equations:

To solve the system of equations a + b = 5 and 3a - 5b = -1, we can use the method of substitution or elimination. Let's use the method of substitution to solve for the values of a and b.

First, solve the first equation for b: b = 5 - a

Now, substitute b in the second equation: 3a - 5(5 - a) = -1

Simplify the equation: 3a - 25 + 5a = -1 8a - 25 = -1 8a = 24 a = 3

Now that we have the value of a, we can find the value of b using the first equation: 3 + b = 5 b = 2

So, the solution to the system of equations is: a = 3 and b = 2.