2 / 3 ( c - 18 ) = 17
multiplying 2 / 3 to the value in bracket
2 c / 3 - 36 / 3 = 7
adding 36/3 on other side
2 c / 3 = 7 + 36 / 3
by taking L.C.M
2 c / 3 = 21 /3 + 36 / 3
2c / 3 = 21 + 36 / 3
2 c / 3 = 57 /3
multiplying 3 on other side
2 c= 57 / 3 ×3
3 will be canceled
2c = 57
dividing 2 on other side
c = 57 / 2
c = 28.5 answer...
