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4y plus x should be 4y minus x L3
L3 is wrong as the 4y-x/12 in L2 is changed to 4y+x/12 in L3.
4y+x should be 4y-x
On L3, "4y+x" should be "4y-x"
L3 is wrong as 4y+x should be 4y-x
Line 3 : 4y + x should be 4y - x
At L3, the 4y-x has been changed to 4y+x
On line 3, the 4y - x from Line 2 to 4y + x on line 3.
Line 3 is wrong.4y+x over 12 should be 4y-x over 12
The Values 4y-x/12 in L2 is changed to 4y+x/12 in L3
L3: 4y+x/12 should be 4y-x/12
in L3 the 4y+x should be 4y-x
L3: should be 4y-x over 12 and not 4y+x over 12so it should not be changed and it should still remain a minus
For the second line, the fraction should be written as one single Mathematical Equation, instead of individually.