(-15)(-3)+b=450

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Solution for (-15)(-3)+b=450 equation: 


Simplifying
(-15)(-3) + b = 450

Multiply -15 * -3
45 + b = 450

Solving
45 + b = 450

Solving for variable 'b'.

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

Add '-45' to each side of the equation.
45 + -45 + b = 450 + -45

Combine like terms: 45 + -45 = 0
0 + b = 450 + -45
b = 450 + -45

Combine like terms: 450 + -45 = 405
b = 405

Simplifying
b = 405

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