40=30+b

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Solution for 40=30+b equation:


Simplifying
40 = 30 + b

Solving
40 = 30 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
40 + -1b = 30 + b + -1b

Combine like terms: b + -1b = 0
40 + -1b = 30 + 0
40 + -1b = 30

Add '-40' to each side of the equation.
40 + -40 + -1b = 30 + -40

Combine like terms: 40 + -40 = 0
0 + -1b = 30 + -40
-1b = 30 + -40

Combine like terms: 30 + -40 = -10
-1b = -10

Divide each side by '-1'.
b = 10

Simplifying
b = 10

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