Width = x, length = x+5, perimeter = 50

solution:

P = 2L + 2W

50 = 2(x+5) + 2x

50 = 2x + 10 + 2x

50 = 4x + 10

50 - 10 = 4x - 10

40 = 4x

40 / 4 = 4x / 4

10 = x

width = x

=10

length = x+5

= 10+5

= 15

solution:

P = 2L + 2W

50 = 2(x+5) + 2x

50 = 2x + 10 + 2x

50 = 4x + 10

50 - 10 = 4x - 10

40 = 4x

40 / 4 = 4x / 4

10 = x

width = x

=10

length = x+5

= 10+5

= 15