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Simplifying 81(b + -1) + 63 = 9(9b + -2) Reorder the terms: 81(-1 + b) + 63 = 9(9b + -2) (-1 * 81 + b * 81) + 63 = 9(9b + -2) (-81 + 81b) + 63 = 9(9b + -2) Reorder the terms: -81 + 63 + 81b = 9(9b + -2) Combine like terms: -81 + 63 = -18 -18 + 81b = 9(9b + -2) Reorder the terms: -18 + 81b = 9(-2 + 9b) -18 + 81b = (-2 * 9 + 9b * 9) -18 + 81b = (-18 + 81b) Add '18' to each side of the equation. -18 + 18 + 81b = -18 + 18 + 81b Combine like terms: -18 + 18 = 0 0 + 81b = -18 + 18 + 81b 81b = -18 + 18 + 81b Combine like terms: -18 + 18 = 0 81b = 0 + 81b 81b = 81b Add '-81b' to each side of the equation. 81b + -81b = 81b + -81b Combine like terms: 81b + -81b = 0 0 = 81b + -81b Combine like terms: 81b + -81b = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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