standard_description: Use variables to represent quantities in a real-world or mathematical problem, and construct simple equations and inequalities to solve problems by reasoning about the quantities.
problem_activity: Draw a tape diagram or balance for each equation or situation below.
a.   You purchase 4 gift cards, each in the same amount. You spend a total of $60.
b.
$${x+6=18}$$
c.
$${6x=18}$$


aligns: no