Question

x+3+3x=7+4
step by step rv2 column proofs please?

Answer 1

i don't understand the def. of sub. and stuff can someone please explain?

Answer 2

You should try to put the "x" in one side, and the numbers in other side. For example,
\[x+3x=7+4-3\] In order to put the 3 in the right side, you have to deduct it from both sides.

Answer 3

what are the stepsd called like commutative ...... & defintion of subtration

Answer 4

Well, I don't think I can say the steps in the same way they teach you, but I call the first pass, "substraction", because we substract a 3 from boths sides.

Answer 5

The you have to apply summation, substraction and conmutative properties (supposing they are steps),
\[4x=11-3\Rightarrow 4x=8\Rightarrow x=2\]
The last step, I think it should be called substitution.