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

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


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

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

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

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

Solving
142 + -189b + -40d = 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 + -189b + -142 + -40d = 0 + -142

Reorder the terms:
142 + -142 + -189b + -40d = 0 + -142

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

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

Add '40d' to each side of the equation.
-189b + -40d + 40d = -142 + 40d

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

Divide each side by '-189'.
b = 0.7513227513 + -0.2116402116d

Simplifying
b = 0.7513227513 + -0.2116402116d

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