1900*(30)=17*30-(10*30)+b

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Solution for 1900*(30)=17*30-(10*30)+b equation: 


Simplifying
1900(30) = 17 * 30 + -1(10 * 30) + b

Multiply 1900 * 30
57000 = 17 * 30 + -1(10 * 30) + b

Multiply 17 * 30
57000 = 510 + -1(10 * 30) + b

Multiply 10 * 30
57000 = 510 + -1(300) + b

Multiply -1 * 300
57000 = 510 + -300 + b

Combine like terms: 510 + -300 = 210
57000 = 210 + b

Solving
57000 = 210 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
57000 + -1b = 210 + b + -1b

Combine like terms: b + -1b = 0
57000 + -1b = 210 + 0
57000 + -1b = 210

Add '-57000' to each side of the equation.
57000 + -57000 + -1b = 210 + -57000

Combine like terms: 57000 + -57000 = 0
0 + -1b = 210 + -57000
-1b = 210 + -57000

Combine like terms: 210 + -57000 = -56790
-1b = -56790

Divide each side by '-1'.
b = 56790

Simplifying
b = 56790

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