Three times a number, X, increased by four is equal to five times the number, x. Which equation can be used to solve for x?
2 answers:
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Answer:
The first set is a solution, the second is not.
Step-by-step explanation:
Testing by filling in the numbers into the equation:
(1, 1.5): x=1, y=1.5
⇒ 1.5 =? · 1 +
⇒ 1.5 =? +
⇒ 1.5 =?
⇒ 1.5 =? 1.5 ⇒ Correct: is indeed solution to the equation
(12, 4): x=12, y=4
⇒ 4 =? · 12 +
⇒ 4 =? +
⇒ 4 =? ⇒ Incorrect: this is not a solution for the equation