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Simplifying 63 = 30(2.1) + b Multiply 30 * 2.1 63 = 63 + b Add '-63' to each side of the equation. 63 + -63 = 63 + -63 + b Combine like terms: 63 + -63 = 0 0 = 63 + -63 + b Combine like terms: 63 + -63 = 0 0 = 0 + b 0 = b Solving 0 = 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. 0 + -1b = b + -1b Remove the zero: -1b = b + -1b Combine like terms: b + -1b = 0 -1b = 0 Divide each side by '-1'. b = 0 Simplifying b = 0
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