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How would you evaluate the expression 3x 4y equals 9 when x equals 2 and y equals 5?
Wiki User
∙ 11y ago
3x + 4y = 9 is an equation, a statement that states the two expressions 3x + 4y and 9 are equal. We like to know if there are any values of the variables x and y that will make the statement a true one.
In our case, we're going to check if x = 2 and y = 5, will satisfy the given equation. In other words, if we substitute the corresponding values of x and y into the equation and the left side will equal to the right side, then (2, 5) is a solution. Otherwise, it's not.
Check:
3x + 4y = 9; x = 2 and y = 5
3(2) + 4(5) =? 9
6 + 20 =? 9
26 = 9 False
Therefore, (2, 5) is not a solution.
Wiki User
∙ 11y ago
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