Question

Given: 3x + 1 = 2 + 2x – 4

Prove: x = –3

Given the equation 3x + 1 = 2 + 2x – 4, use the commutative property to rearrange the terms so that like terms are next to one another. This gives the equation 3x + 1 = 2 – 4 + 2x. Then use the associative property of addition to group the like terms. This gives the equation 3x + 1 = (2 – 4) + 2x. Next, combine like terms to get the equation 3x + 1 = – 2 + 2x. Use the subtraction property of equality to subtract 2x from both sides of the equation. This gives the equation x + 1 = – 2. Then use the _________________________ to subtract 1 from both s

Answer 1

ii need to know the name of the justification that fits in the blank.. i forgot what it was called but if i saw it i think i would know it

Answer 2

subtraction property of equality

Answer 3

It is the same property used for subtracting 2x in the prior step. Just that you are applying it to the constant terms.

Answer 4

property of equality!!! ok cool got it i knew it has todo with subtraction but i didnt know which justification thanks! =)