-3B+21=3(4B+2)

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Solution for -3B+21=3(4B+2) equation:


Simplifying
-3B + 21 = 3(4B + 2)

Reorder the terms:
21 + -3B = 3(4B + 2)

Reorder the terms:
21 + -3B = 3(2 + 4B)
21 + -3B = (2 * 3 + 4B * 3)
21 + -3B = (6 + 12B)

Solving
21 + -3B = 6 + 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.
21 + -3B + -12B = 6 + 12B + -12B

Combine like terms: -3B + -12B = -15B
21 + -15B = 6 + 12B + -12B

Combine like terms: 12B + -12B = 0
21 + -15B = 6 + 0
21 + -15B = 6

Add '-21' to each side of the equation.
21 + -21 + -15B = 6 + -21

Combine like terms: 21 + -21 = 0
0 + -15B = 6 + -21
-15B = 6 + -21

Combine like terms: 6 + -21 = -15
-15B = -15

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

Simplifying
B = 1

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