<span>28+29+42=99 Hope this helps!</span>
It would be false to have the same sign.
First line because 4(2a+1)=8a+4 and 9a+4-(8a+4)= a
Second line because a times 2 =2a and 2a+1-2a=1
<span>Although the second equality is more or less obvious since 2a+1 leaves a remainder of 1 when divided by a.</span>
Step-by-step explanation:
Consider the LHS, after the 5th step, consider the RHS





Consider the RHS




