The true conditional statement, "if 5x + 7 = 2x - 1, then 3x + 7 = -1," illustrates which property of equality?
addition property of equality
subtraction property of equality
multiplication property of equality
division property of equality

The given condition is:
If 5x + 7 = 2x =1, then 3x + 7 = -1
=> This given equation represent  a subtraction property of equality.
=> 5x +7 =2x-1
=> 5x – 2x + 7 = -1
=> 3x + 7 = -1

What we did was  we subtracted 2x from 5x to get the 3x
Subtraction property of equality is a mathematical process in where we subtract numbers from both sides that contains the same expression.
Like 5x and 2x, since they have the same equation, we both subtracted both numbers and the rest remains as it is.

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!

+1,000)=g7e=mc2-g=7 because if you know algebra you should know g=7 to get your answer