Description

Proportions with one unknown: '4/7 = x/21' (x=12), '6/x = 9/15' (x=10), 'x/8 = 15/24' (x=5). 12 problems with the variable in all four positions. Show cross-multiplication setup as a hint for wrong answers. Include word problems: 'If 3 shirts cost $45, how much do 7 shirts cost?' (set up 3/45 = 7/x

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