When We Add the Two Equations of the System $\log _ { 5 } ( 2 x - 7 ) = \log _ { 5 } ( x + 1 )$

Short Answer

When we add the two equations of the system $\log _ { 5 } ( 2 x - 7 ) = \log _ { 5 } ( x + 1 )$ , the y -terms are __________.