-1=2(5b+3)

Solution for -1=2(5b+3) equation:

Simplifying
-1 = 2(5b + 3)

Reorder the terms:
-1 = 2(3 + 5b)
-1 = (3 * 2 + 5b * 2)
-1 = (6 + 10b)

Solving
-1 = 6 + 10b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-10b' to each side of the equation.
-1 + -10b = 6 + 10b + -10b

Combine like terms: 10b + -10b = 0
-1 + -10b = 6 + 0
-1 + -10b = 6

Add '1' to each side of the equation.
-1 + 1 + -10b = 6 + 1

Combine like terms: -1 + 1 = 0
0 + -10b = 6 + 1
-10b = 6 + 1

Combine like terms: 6 + 1 = 7
-10b = 7

Divide each side by '-10'.
b = -0.7

Simplifying
b = -0.7