Question

3х+78=9 и 2х+5b=-11???

Answer 1

Ответы: 1)х=-23; х= -11/2-5/2b

Answer 2

To solve the system of equations:

1. 3x + 78 = 9
2. 2x + 5b = -11

We need to find the values of 'x' and 'b' that satisfy both equations simultaneously.

Let's start by solving the first equation (1):

1. 3x + 78 = 9

Subtract 78 from both sides to isolate the term with 'x':

3x = 9 - 78 3x = -69

Now, divide both sides by 3 to solve for 'x':

x = -69 / 3 x = -23

Now that we have found the value of 'x', let's solve the second equation (2):

2. 2x + 5b = -11

Substitute the value of 'x' (-23) into the equation:

2(-23) + 5b = -11

Simplify the left side:

-46 + 5b = -11

Now, isolate the term with 'b' by adding 46 to both sides:

5b = -11 + 46 5b = 35

Finally, divide both sides by 5 to solve for 'b':

b = 35 / 5 b = 7

So, the solution to the system of equations is x = -23 and b = 7.