-[3b-15]=6[2b+5]

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Solution for -[3b-15]=6[2b+5] equation:


Simplifying
-1[3b + -15] = 6[2b + 5]

Reorder the terms:
-1[-15 + 3b] = 6[2b + 5]
[-15 * -1 + 3b * -1] = 6[2b + 5]
[15 + -3b] = 6[2b + 5]

Reorder the terms:
15 + -3b = 6[5 + 2b]
15 + -3b = [5 * 6 + 2b * 6]
15 + -3b = [30 + 12b]

Solving
15 + -3b = 30 + 12b

Solving for variable 'b'.

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

Add '-12b' to each side of the equation.
15 + -3b + -12b = 30 + 12b + -12b

Combine like terms: -3b + -12b = -15b
15 + -15b = 30 + 12b + -12b

Combine like terms: 12b + -12b = 0
15 + -15b = 30 + 0
15 + -15b = 30

Add '-15' to each side of the equation.
15 + -15 + -15b = 30 + -15

Combine like terms: 15 + -15 = 0
0 + -15b = 30 + -15
-15b = 30 + -15

Combine like terms: 30 + -15 = 15
-15b = 15

Divide each side by '-15'.
b = -1

Simplifying
b = -1

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