Y = 2x - 4
y = x + 1

solving by substitution, can any tell me what x and y equal?

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

Solve the formula ax+ by = c for x.

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8