Question

8(6x-7)-17x= 9y-5(17-y)= 0,6(4x-3)+2,1(x-5)= 2,5(4a-8b)-(3a-4b)умножить на 1/4=

Answer 1

48x-7-17x=48x-17x-7=31x-7
9y-85+5y=9y+5y-85=14y-85
2,4x-1,8+2,1x-10,5=2,4x+2,1x-1,8-10,5=4,5x-0,3

Answer 2

Let's solve each equation step by step:

1. 8(6x-7) - 17x = 9y - 5(17-y) = 0

First, simplify the left side:

48x - 56 - 17x = 9y - 85 + 5y

Now, combine like terms:

(48x - 17x) - 56 = (9y + 5y) - 85

31x - 56 = 14y - 85

Now, let's isolate the variables:

31x = 14y - 85 + 56

31x = 14y - 29

Now, divide both sides by 31 to solve for x:

x = (14y - 29) / 31

2. 6(4x-3) + 2.1(x-5) = 2.5(4a-8b) - (3a-4b) * (1/4)

Let's simplify the equation:

24x - 18 + 2.1x - 10 = 10a - 20b - (3a/4 + b)

Combine like terms on both sides:

(24x + 2.1x) - 18 - 10 + (20b - b) = 10a - (3a/4)

26.1x - 28 + 19b = 10a - (3a/4)

Now, combine the constants:

26.1x - 28 + 19b = (40a/4) - (3a/4)

Combine the fractions on the right side:

26.1x - 28 + 19b = (37a/4)

To solve for a in terms of x and b:

37a/4 = 26.1x - 28 + 19b

Multiply both sides by 4/37 to isolate a:

a = (4/37)(26.1x - 28 + 19b)

So, you have the equations:

1. x = (14y - 29) / 31
2. a = (4/37)(26.1x - 28 + 19b)