5*9+8=71+b*9

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Solution for 5*9+8=71+b*9 equation:


Simplifying
5 * 9 + 8 = 71 + b * 9

Multiply 5 * 9
45 + 8 = 71 + b * 9

Combine like terms: 45 + 8 = 53
53 = 71 + b * 9

Reorder the terms for easier multiplication:
53 = 71 + 9b

Solving
53 = 71 + 9b

Solving for variable 'b'.

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

Add '-9b' to each side of the equation.
53 + -9b = 71 + 9b + -9b

Combine like terms: 9b + -9b = 0
53 + -9b = 71 + 0
53 + -9b = 71

Add '-53' to each side of the equation.
53 + -53 + -9b = 71 + -53

Combine like terms: 53 + -53 = 0
0 + -9b = 71 + -53
-9b = 71 + -53

Combine like terms: 71 + -53 = 18
-9b = 18

Divide each side by '-9'.
b = -2

Simplifying
b = -2

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