McGraw Hill Glencoe Algebra 2, 2012
MH
McGraw Hill Glencoe Algebra 2, 2012 View details
3. Solving Equations
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Exercise 77 Page 25

The sum of a number and its additive inverse is 0.

2x

Practice makes perfect

The sum of a number and its additive inverse is 0. We can find the additive inverse by changing the sign of the given number. a + ( - a)=0 We can follow this line of thinking with the given number. -2x + 2x=0 The additive inverse of -2x is 2x.