Mohon bantuannya yaa

7. ( 7x + 8) + ( 5x + 4 )
   = 7x+5x+8+4 = 180 
   = 12x + 12 = 180
   =12x = 180-12
   = 12x = 168
x = 168 : 12
x = 14
PQR = 7(14) +8
         = 98 + 8 = 106 DERAJAT