15-9(9+10b)+(20b-4)=22

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Solution for 15-9(9+10b)+(20b-4)=22 equation:


Simplifying
15 + -9(9 + 10b) + (20b + -4) = 22
15 + (9 * -9 + 10b * -9) + (20b + -4) = 22
15 + (-81 + -90b) + (20b + -4) = 22

Reorder the terms:
15 + -81 + -90b + (-4 + 20b) = 22

Remove parenthesis around (-4 + 20b)
15 + -81 + -90b + -4 + 20b = 22

Reorder the terms:
15 + -81 + -4 + -90b + 20b = 22

Combine like terms: 15 + -81 = -66
-66 + -4 + -90b + 20b = 22

Combine like terms: -66 + -4 = -70
-70 + -90b + 20b = 22

Combine like terms: -90b + 20b = -70b
-70 + -70b = 22

Solving
-70 + -70b = 22

Solving for variable 'b'.

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

Add '70' to each side of the equation.
-70 + 70 + -70b = 22 + 70

Combine like terms: -70 + 70 = 0
0 + -70b = 22 + 70
-70b = 22 + 70

Combine like terms: 22 + 70 = 92
-70b = 92

Divide each side by '-70'.
b = -1.314285714

Simplifying
b = -1.314285714

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