5(1+3b)+7(7-3b)=30

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Solution for 5(1+3b)+7(7-3b)=30 equation:


Simplifying
5(1 + 3b) + 7(7 + -3b) = 30
(1 * 5 + 3b * 5) + 7(7 + -3b) = 30
(5 + 15b) + 7(7 + -3b) = 30
5 + 15b + (7 * 7 + -3b * 7) = 30
5 + 15b + (49 + -21b) = 30

Reorder the terms:
5 + 49 + 15b + -21b = 30

Combine like terms: 5 + 49 = 54
54 + 15b + -21b = 30

Combine like terms: 15b + -21b = -6b
54 + -6b = 30

Solving
54 + -6b = 30

Solving for variable 'b'.

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

Add '-54' to each side of the equation.
54 + -54 + -6b = 30 + -54

Combine like terms: 54 + -54 = 0
0 + -6b = 30 + -54
-6b = 30 + -54

Combine like terms: 30 + -54 = -24
-6b = -24

Divide each side by '-6'.
b = 4

Simplifying
b = 4

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