77=.5(7)(9+b)

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Solution for 77=.5(7)(9+b) equation:


Simplifying
77 = 0.5(7)(9 + b)

Multiply 0.5 * 7
77 = 3.5(9 + b)
77 = (9 * 3.5 + b * 3.5)
77 = (31.5 + 3.5b)

Solving
77 = 31.5 + 3.5b

Solving for variable 'b'.

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

Add '-3.5b' to each side of the equation.
77 + -3.5b = 31.5 + 3.5b + -3.5b

Combine like terms: 3.5b + -3.5b = 0.0
77 + -3.5b = 31.5 + 0.0
77 + -3.5b = 31.5

Add '-77' to each side of the equation.
77 + -77 + -3.5b = 31.5 + -77

Combine like terms: 77 + -77 = 0
0 + -3.5b = 31.5 + -77
-3.5b = 31.5 + -77

Combine like terms: 31.5 + -77 = -45.5
-3.5b = -45.5

Divide each side by '-3.5'.
b = 13

Simplifying
b = 13

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