3(b-2)-4(2b+5)=9

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Solution for 3(b-2)-4(2b+5)=9 equation:


Simplifying
3(b + -2) + -4(2b + 5) = 9

Reorder the terms:
3(-2 + b) + -4(2b + 5) = 9
(-2 * 3 + b * 3) + -4(2b + 5) = 9
(-6 + 3b) + -4(2b + 5) = 9

Reorder the terms:
-6 + 3b + -4(5 + 2b) = 9
-6 + 3b + (5 * -4 + 2b * -4) = 9
-6 + 3b + (-20 + -8b) = 9

Reorder the terms:
-6 + -20 + 3b + -8b = 9

Combine like terms: -6 + -20 = -26
-26 + 3b + -8b = 9

Combine like terms: 3b + -8b = -5b
-26 + -5b = 9

Solving
-26 + -5b = 9

Solving for variable 'b'.

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

Add '26' to each side of the equation.
-26 + 26 + -5b = 9 + 26

Combine like terms: -26 + 26 = 0
0 + -5b = 9 + 26
-5b = 9 + 26

Combine like terms: 9 + 26 = 35
-5b = 35

Divide each side by '-5'.
b = -7

Simplifying
b = -7

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