10(7-4b)-9(21b-8)=0

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Solution for 10(7-4b)-9(21b-8)=0 equation:


Simplifying
10(7 + -4b) + -9(21b + -8) = 0
(7 * 10 + -4b * 10) + -9(21b + -8) = 0
(70 + -40b) + -9(21b + -8) = 0

Reorder the terms:
70 + -40b + -9(-8 + 21b) = 0
70 + -40b + (-8 * -9 + 21b * -9) = 0
70 + -40b + (72 + -189b) = 0

Reorder the terms:
70 + 72 + -40b + -189b = 0

Combine like terms: 70 + 72 = 142
142 + -40b + -189b = 0

Combine like terms: -40b + -189b = -229b
142 + -229b = 0

Solving
142 + -229b = 0

Solving for variable 'b'.

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

Add '-142' to each side of the equation.
142 + -142 + -229b = 0 + -142

Combine like terms: 142 + -142 = 0
0 + -229b = 0 + -142
-229b = 0 + -142

Combine like terms: 0 + -142 = -142
-229b = -142

Divide each side by '-229'.
b = 0.6200873362

Simplifying
b = 0.6200873362

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