A+B+B+B+80+90-100=0

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Solution for A+B+B+B+80+90-100=0 equation:


Simplifying
A + B + B + B + 80 + 90 + -100 = 0

Reorder the terms:
80 + 90 + -100 + A + B + B + B = 0

Combine like terms: 80 + 90 = 170
170 + -100 + A + B + B + B = 0

Combine like terms: 170 + -100 = 70
70 + A + B + B + B = 0

Combine like terms: B + B = 2B
70 + A + 2B + B = 0

Combine like terms: 2B + B = 3B
70 + A + 3B = 0

Solving
70 + A + 3B = 0

Solving for variable 'A'.

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

Add '-70' to each side of the equation.
70 + A + -70 + 3B = 0 + -70

Reorder the terms:
70 + -70 + A + 3B = 0 + -70

Combine like terms: 70 + -70 = 0
0 + A + 3B = 0 + -70
A + 3B = 0 + -70

Combine like terms: 0 + -70 = -70
A + 3B = -70

Add '-3B' to each side of the equation.
A + 3B + -3B = -70 + -3B

Combine like terms: 3B + -3B = 0
A + 0 = -70 + -3B
A = -70 + -3B

Simplifying
A = -70 + -3B

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