i don’t know what you mean but i’m guessing you’re saying like, ex: 4x+9=3x-3 or something. in that situation we would do something my algebra 1 teacher would call the magic tunnel. step 1: move the 3x over and flip the sign (make it -3x because we’re going across the sign!) step 2: move the +9 over to the other side and flip the sign (make it -9!) your new problem would be 4x-3x=-3-9. step 3: do the math on each side of the equal sign (4x-3x=x), (-3-9=-12) therefore you now have your answer x=-12.
