A+A+A+B+B=30

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Solution for A+A+A+B+B=30 equation: 


Simplifying
A + A + A + B + B = 30

Combine like terms: A + A = 2A
2A + A + B + B = 30

Combine like terms: 2A + A = 3A
3A + B + B = 30

Combine like terms: B + B = 2B
3A + 2B = 30

Solving
3A + 2B = 30

Solving for variable 'A'.

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

Add '-2B' to each side of the equation.
3A + 2B + -2B = 30 + -2B

Combine like terms: 2B + -2B = 0
3A + 0 = 30 + -2B
3A = 30 + -2B

Divide each side by '3'.
A = 10 + -0.6666666667B

Simplifying
A = 10 + -0.6666666667B

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