9=2(4)+b

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Solution for 9=2(4)+b equation:


Simplifying
9 = 2(4) + b

Multiply 2 * 4
9 = 8 + b

Solving
9 = 8 + 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.
9 + -1b = 8 + b + -1b

Combine like terms: b + -1b = 0
9 + -1b = 8 + 0
9 + -1b = 8

Add '-9' to each side of the equation.
9 + -9 + -1b = 8 + -9

Combine like terms: 9 + -9 = 0
0 + -1b = 8 + -9
-1b = 8 + -9

Combine like terms: 8 + -9 = -1
-1b = -1

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

Simplifying
b = 1

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