5=3(7)+b

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Solution for 5=3(7)+b equation:


Simplifying
5 = 3(7) + b

Multiply 3 * 7
5 = 21 + b

Solving
5 = 21 + 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.
5 + -1b = 21 + b + -1b

Combine like terms: b + -1b = 0
5 + -1b = 21 + 0
5 + -1b = 21

Add '-5' to each side of the equation.
5 + -5 + -1b = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -1b = 21 + -5
-1b = 21 + -5

Combine like terms: 21 + -5 = 16
-1b = 16

Divide each side by '-1'.
b = -16

Simplifying
b = -16

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