4(5b-10)=990

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Solution for 4(5b-10)=990 equation:


Simplifying
4(5b + -10) = 990

Reorder the terms:
4(-10 + 5b) = 990
(-10 * 4 + 5b * 4) = 990
(-40 + 20b) = 990

Solving
-40 + 20b = 990

Solving for variable 'b'.

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

Add '40' to each side of the equation.
-40 + 40 + 20b = 990 + 40

Combine like terms: -40 + 40 = 0
0 + 20b = 990 + 40
20b = 990 + 40

Combine like terms: 990 + 40 = 1030
20b = 1030

Divide each side by '20'.
b = 51.5

Simplifying
b = 51.5

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