20c+25b+30=690

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Solution for 20c+25b+30=690 equation:


Simplifying
20c + 25b + 30 = 690

Reorder the terms:
30 + 25b + 20c = 690

Solving
30 + 25b + 20c = 690

Solving for variable 'b'.

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

Add '-30' to each side of the equation.
30 + 25b + -30 + 20c = 690 + -30

Reorder the terms:
30 + -30 + 25b + 20c = 690 + -30

Combine like terms: 30 + -30 = 0
0 + 25b + 20c = 690 + -30
25b + 20c = 690 + -30

Combine like terms: 690 + -30 = 660
25b + 20c = 660

Add '-20c' to each side of the equation.
25b + 20c + -20c = 660 + -20c

Combine like terms: 20c + -20c = 0
25b + 0 = 660 + -20c
25b = 660 + -20c

Divide each side by '25'.
b = 26.4 + -0.8c

Simplifying
b = 26.4 + -0.8c

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