Choose the property illustrated by: If 3x + 8=x + 12, then 2x=4. Multiplication or Reflexive or addition?

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2007-12-11 11:40:43 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

Addition. Add -8 and -x to both sides of the equation.

2007-12-11 11:44:01 · answer #1 · answered by DWRead 7 · 0⤊ 0⤋

Addition Property of Equality. You've added a -x and a -8 to both sides of the equation.

that's it! :)

2007-12-11 11:44:07 · answer #2 · answered by Marley K 7 · 0⤊ 0⤋

Addition property -- the first equation can be changed to the second, equivalent equation by adding equal things to both sides.

2007-12-11 11:44:32 · answer #3 · answered by nicholasm40 3 · 0⤊ 0⤋

addition of -x - 8 to both sides.

2007-12-11 11:44:23 · answer #4 · answered by Philo 7 · 0⤊ 0⤋

its called simplyfieng......

2007-12-11 11:44:14 · answer #5 · answered by Plain Silly 4 · 0⤊ 1⤋