Question

4(1,2b+3,7)-2,8=5,2b

Answer 1

Пошаговое объяснение:

4(1,2b+3,7)-2,8=5,2b

4,8b+14,8-2,8=5,2b

4,8b+12=5,2b

4,8b-5,2b= -12

-0,4b= -12 /: -0,4

b=30

Answer 2

It seems like you've provided an equation, but it's a bit unclear. I'll try to interpret and solve it for you.

The equation you've given is:

4(1,2b+3,7) - 2,8 = 5,2b

First, let's simplify the left side of the equation:

4(1,2b+3,7) = 4 * (1 + 2b + 3.7)

Now distribute the 4:

4 * (1 + 2b + 3.7) = 4 + 8b + 14.8

So, the equation becomes:

4 + 8b + 14.8 - 2.8 = 5,2b

Now, combine the constants on the left side:

16.8 + 8b - 2.8 = 5,2b

Now, subtract 8b from both sides:

16.8 - 2.8 = 5,2b - 8b

14 = -2,8b

Finally, divide both sides by -2.8:

b = 14 / -2.8

b = -5

So, the solution to the equation is b = -5.