If the long side on both is 9ft and 3ft then 3•3 is 9 so for the short side you do the same. If the short side is 1ft and the other is "j" then it's 1•3 is 3.
1•3=3
Sorry if it's confusing the way I explained it.
Answer: A, B, D
A, B, and D are equations because an equation has an equal sign that connects two expressions together (i.e., equations have equal signs). In this case, only A, B, and D have equal signs.
Answer: X = 7.
Step-by-step explanation: Move all terms that don't contain x to the right side and solve.
<em>I'll go step-by-step.</em>
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1. Add 5 to <u>both</u> sides. 6x-(5+5)=37+5
2. Simplify 6x=42
3. Divide <u>both</u> sides by 6. 
4. Then simplify/Divide. 42 / 6 = 7
That's how you get 7!
X = 7