( x + 10 ) = 75% ( x + 48 - 10 )
x + 10 = 75% ( x + 38 )
x + 10 = 75%x + 28.5
x - 75%x = 28.5 - 10
25%x = 18.5
x = 18.5 ÷ 25%
x = 74