George and bella are asked to solve −3x − 30 = 5x + 18. identify where one of them made an error.
george
bella
− 3x − 30 = 5x + 18
− 3x − 30 − 5x = 5x + 18 −5x
−8x − 30 = 18
− 8x − 30 + 30 = 18 + 30
−8x = 48
negative 8x over negative 8 equals 48 over negative 8
x = − 6
− 3x − 30 = 5x + 18
−3x − 30 − 3x = 5x + 18 − 3x
− 30 = 2x + 18
−30 − 18 = 2x + 18 −18
− 48= 2x
negative 48 over 2 equals 2x over 2
x=−24

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