Given: 2x + 4 = 1 – 2x – 5
Prove: x = –2
Given the equation 2x + 4 = 1 – 2x – 5, use the commutative property to rearrange the terms so that like terms are next to one another. This gives the equation 2x + 4 = 1 – 5 – 2x. Then, use the associative property of addition to group the like terms. This gives the equation 2x + 4 = (1 – 5) – 2x. Next, combine like terms to get the equation 2x + 4 = –4 – 2x. Use the ___________________ to add 2x to both sides of the equation. This gives the equation 4x + 4 = –4. Then use the subtraction property of equality to subtract 4 from both sides of

Question

Given: 2x + 4 = 1 – 2x – 5
Prove: x = –2
Given the equation 2x + 4 = 1 – 2x – 5, use the commutative property to rearrange the terms so that like terms are next to one another.  This gives the equation 2x + 4 = 1 – 5 – 2x.  Then, use the associative property of addition to group the like terms.  This gives the equation 2x + 4 = (1 – 5) – 2x.  Next, combine like terms to get the equation 2x + 4 = –4 – 2x.  Use the ___________________ to add 2x to both sides of the equation.  This gives the equation 4x + 4 = –4.  Then use the subtraction property of equality to subtract 4 from both sides of

anonymous · Answer

the equation 
by 4 to give a final solution of x = –2.  Therefore, given 2x + 4 = 1 – 2x – 5, x is equal to –2.
 
Which justification was left out of the paragraph proof above?

anonymous · Answer

Associative Property of Addition
		Subtraction Property of Equality
		Addition Property of Equality
		Commutative Property of Subtraction

anonymous · Answer

http://www.wolframalpha.com/input/?i=2x+%2B+4+%3D+1+%E2%80%93+2x+%E2%80%93+5