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 sides of the equation. This gives the solution x = –3. Therefore, given the equation 3x + 1 = 2 + 2x – 4, x is equal to –3.

Which justification was left out of the paragraph proof above?

Answer 1

flvs I see

Answer 2

geometry

Answer 3

Yeah.

Answer 4

i got subtraction property of Equality

Answer 5

How did you get that?

Answer 6

because you know when you had the equation x + 1 = – 2 you had to subtract the 1 to leave the x alone so that's why it is subtraction property of equality

Answer 7

yea same

Answer 8

Fried is correct :D

Answer 9

Thanks FR. and Chu(:

Answer 10

yw

Answer 11

lol np

Answer 12

Wait. The subtraction property of equality is already in the paragraph proof. How does that work? I'm so confused.

Answer 13

there can be 2

Answer 14

or more depends

Answer 15

Oh okay. O_o