2x – 8 + x = 3(x – 8) + 16

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

If the perimeter of the square equals the perimeter of the regular pentagon. each side of a pentagon is 16cm long. how long is each side of the square?