x multiplied by y can simply be written as xy. You can't find the value of this expression, until you assume specific values for the variables, x and y.
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y is the result if you multiply x by 3 and add 5 to it. For example, if you claim that x is 1, then if you multiply x by 3 and add 5, you would get 8. This result, 8, is what y is equal to (when x equals 1).
x times y is "xy"
8
No
If Y=10 when X=5 then when Y=20 (10 * 2) X must equal 10 (5 * 2). One must multiply the values on both sides of the equal sign by the same value to maintain their equality. In this case, since Y went from 10 to 20 it was multiplied by 2. That means we have to multiply the other side by 2 to maintain equivalence.