Question

13a+10b+b+a=15c+14c-13c=30×-(4×+7×)=5a+5c+8a+4c=​

Answer 1

Ответ:

13a+10b+b+a=14a+11b

15c+14c-13c=29c-13c=16c

30×-(4×+7×)=19×

5a+5c+8a+4c=13a+9c

Answer 2

На фото

Думаю помог

.

Answer 3

It appears you've given a set of equations involving the variables a, b, and c. Let's break it down step by step to solve for these variables:

1. 13a + 10b + b + a = 15c + 14c - 13c Combine like terms: 14a + 11b = 16c Divide both sides by 2 to simplify: 7a + 5.5b = 8c

2. 30 × -(4a + 7c) Distribute the 30 to the terms inside the parentheses: -30 × 4a - 30 × 7c -120a - 210c

3. 5a + 5c + 8a + 4c Combine like terms: 13a + 9c

Now you have the equations:

1. 7a + 5.5b = 8c
2. -120a - 210c
3. 13a + 9c

You can now solve this system of equations to find the values of a, b, and c. Let's start by solving equation 2:

-120a - 210c = 0

Divide both sides by -30 to simplify:

4a + 7c = 0

Now, you can solve equations 1 and 3 as a system of linear equations:

7a + 5.5b = 8c 13a + 9c = 0

You can solve for c in terms of a using equation 4:

4a + 7c = 0 7c = -4a c = (-4/7)a

Now substitute this expression for c in equation 1:

7a + 5.5b = 8(-4/7)a

Now, simplify the equation:

7a + 5.5b = (-32/7)a

To solve for b, move the terms involving a to the left side:

7a + (32/7)a = 5.5b

Combine the terms involving a:

(49/7)a = 5.5b

Now, simplify the equation:

(7/49)(49/7)a = (7/49)(5.5b)

a = (38.5/49)b

Now, you have expressions for c and a in terms of b:

c = (-4/7)a a = (38.5/49)b

You can use these expressions to find the values of a, b, and c. Since there are still multiple variables and not enough equations to uniquely determine their values, you can express one of the variables in terms of the others but will need additional information or equations to find specific values for a, b, and c.