4(8-13)=b-9

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Solution for 4(8-13)=b-9 equation:


Simplifying
4(8 + -13) = b + -9

Combine like terms: 8 + -13 = -5
4(-5) = b + -9

Multiply 4 * -5
-20 = b + -9

Reorder the terms:
-20 = -9 + b

Solving
-20 = -9 + 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.
-20 + -1b = -9 + b + -1b

Combine like terms: b + -1b = 0
-20 + -1b = -9 + 0
-20 + -1b = -9

Add '20' to each side of the equation.
-20 + 20 + -1b = -9 + 20

Combine like terms: -20 + 20 = 0
0 + -1b = -9 + 20
-1b = -9 + 20

Combine like terms: -9 + 20 = 11
-1b = 11

Divide each side by '-1'.
b = -11

Simplifying
b = -11

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