Write the sentence below as an equation and solve for the number. Let the variable $x$x represent the number.
"If $11$11 is subtracted from a number, the result is $-7$−7."
Write the sentence below as an equation and solve for the number. Let the variable $y$y represent the number.
"The quotient of a number and $-3$−3 is $-20$−20."
Vanessa is cutting out a rectangular board to construct a bookshelf.
The board is to have a perimeter of $48$48 inches, and its length is to be $3$3 inches shorter than double the width.
When a number is added to both the numerator and denominator of $\frac{1}{5}$15, the result is $\frac{3}{7}$37.