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Mental Math Problems (algebra) - University of Washington

Mental Math Problems (algebra): (1) Evaluate 2x for x = 3. (2) Evaluate 1 x for x = 3. (3) Evaluate (x+ 1)2 for x = 1. (4) Evaluate a+ b for a = b, b = 4. (5) Solve for x in 3x = 24 (6) Solve for x in 1 3 x = 8 (7) Solve for x in 5 + x = 20 (8) Solve for x in x 5 = 5 (9) Solve for x in x+ 3 = 1 (10) Solve for x in 1000 100 + x = 1