Question

1)5(7-b)-3*(b+2)=2)15*(x-2)+(4-x)=3)5*(4a-3b)-2*(5a-3b)=​

Answer 1

Ответ:

Пошаговое объяснение:=35-5b-3b-6=29-8b   2)=15x-30+4-x=14x-26    3)=20a-15b-10a+6b=10a-9b

Answer 2

Let's solve each of these equations step by step:

1. 5(7-b) - 3(b+2) = 0

First, distribute the numbers inside the parentheses:

35 - 5b - 3b - 6 = 0

Combine like terms:

35 - 8b - 6 = 0

Now, combine the constants:

29 - 8b = 0

Next, isolate the variable b by adding 8b to both sides:

29 = 8b

Now, divide both sides by 8 to solve for b:

b = 29/8

2. 15(x-2) + (4-x) = 0

First, distribute the numbers inside the parentheses:

15x - 30 + 4 - x = 0

Combine like terms:

14x - 26 = 0

Now, add 26 to both sides:

14x = 26

Next, divide both sides by 14 to solve for x:

x = 26/14 = 13/7

3. 5(4a-3b) - 2(5a-3b) = 0

First, distribute the numbers inside the parentheses:

20a - 15b - 10a + 6b = 0

Now, combine like terms:

(20a - 10a) - (15b - 6b) = 0

10a - 9b = 0

Now, add 9b to both sides:

10a = 9b

Finally, divide both sides by 10 to solve for a:

a = (9b)/10

So, the solutions are:

1. b = 29/8
2. x = 13/7
3. a = (9b)/10