x + ( x - 3 ) + ( x - 4 ) + ( x - 5 ) = 80
4x-12=80
4x=80+12
4x=92
x=92:4
x=23
x + ( x - 3 ) + ( x - 4 ) + ( x - 5 ) = 80 4x-12=80 4x=80+12 4x=92 x=92:4 x=23
x + ( x - 3 ) + ( x - 4 ) + ( x - 5 ) = 80
4x-12=80
4x=80+12
4x=92
x=92:4
x=23
x + ( x - 3 ) + ( x - 4 ) + ( x - 5 ) = 80 4x-12=80 4x=80+12 4x=92 x=92:4 x=23