1=4*5+b

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Solution for 1=4*5+b equation:


Simplifying
1 = 4 * 5 + b

Multiply 4 * 5
1 = 20 + b

Solving
1 = 20 + 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.
1 + -1b = 20 + b + -1b

Combine like terms: b + -1b = 0
1 + -1b = 20 + 0
1 + -1b = 20

Add '-1' to each side of the equation.
1 + -1 + -1b = 20 + -1

Combine like terms: 1 + -1 = 0
0 + -1b = 20 + -1
-1b = 20 + -1

Combine like terms: 20 + -1 = 19
-1b = 19

Divide each side by '-1'.
b = -19

Simplifying
b = -19

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