Question

The addition Property of Equality

1. for each of these equation
*solve the equation
*justify each step with either the addition property of equality, a number property or an operation
*check the solution (write how you get the answer)

a. x - 7 = 0

b.2x - 7 =x

c. 6x - 7 =5x


can someone solve this for me???

Answer 1

Lemme show you some examples



2x+5=3


Just take the 3 on the other hand it is +3 when it crosses = sign it will become -3


2x+5-3=0

2x+2=0


If we shift +2 on the other hand it will become -2

2x=-2


and

x=-1


Similarly



x-5=0


Take the -5 on the other hand it will become +5


x=5



I hope you can do this yourself now.

Answer 2

i.e. note that addition property of equality means that
if x-a=0, where a is a number,
then if you add a to it, you must add to both sides.
x-a +a =0+a