6x+7+5x+5+7x-1=180 combine all like terms 6x+5x+7x=18x 7+5-1=11 rewrite 18x+11=180 subtract 11 from both sides 169 rewrite 18x=169 divide 18 from both sides witch is 9 x=9 plug 9 in for x 6(9)+7=54+7=61 AC=61
Hopes this helps and i hope this is right have a nice evening
