PLEASE PLEASE HELP!!!GIVING BRAINLEIST!! RESPOND IN 5 MIN FOR POINTS!!❤️

Step-by-step explanation:The error carolyn has made is that she hasn't subtracted properly.2x + 3y - (2x +6y) = 2x - 2x + 3y - 6y = -3y.Carolyn probably didn't use parentheses...To do the thing in substitution, we single out x or y in any equation. In this case, i'm gonna single out the x in the 2nd eqn. In other words, i'll make x the subject of the 2nd eqn.2x + 6y = 102x         = 10 - 6yx           = 5 - 3y Now we simply plug in 5 - 3y wherever x apperas in the 1st equation.2 (5-3y) + 3y = 810 - 6y + 3y   = 810 - 3y           = 8-3y                 =  -2y                    = 2/3Then x = 5 - 3*2/3 = 3 x=3y=2/3Hope it helps:)