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Sliva [168]
3 years ago
15

The sum of three numbers is 69. The second number is 6 less than the first. The third number is 3 times the first. What are the

numbers?
Mathematics
1 answer:
almond37 [142]3 years ago
7 0

Answer and Step-by-step explanation:

To solve, we would set the first number to x, and make an equation.

<u>Solve for x.</u>

x + (x - 6) + 3x = 69.

<u>Add and combine like terms.</u>

2x + 3x - 6 = 69

5x - 6 = 69

<u>Add 6 to each side of the equation.</u>

5x = 75

Divide by 5 to both sides.

x = 15

<u>The first number is 15.</u>

<u>The second number is (x - 6) = (15 - 6) = 9.</u>

<u>The third number is 3x = 3(15) = 45.</u>

<u />

<u />

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

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The graph is shown in the attached pictures.

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Step-by-step explanation:

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Remember that slope-intercept form is in y = mx + b format, and that m is the slope and b is the y-intercept. With this information, we know that (0, \frac{9}{2}) is the y-intercept and \frac{1}{4} is the slope of this equation. We can plot the point (0, \frac{9}{2}) on the graph, and then use the slope of \frac{1}{4} from there to graph other points and form a line. (When I graphed the line, I didn't include these "other points" so it wasn't confusing to locate which points were the three solutions listed.)

2. Points that solve an equation - or solutions - are also points that the line of the equation intersects. So, what we can do is form a table, plug in some x values into the equation, and solve for a y-value. The x and y values will form a point that is on the graph, thus they are solutions. (Please look at the second picture for work and clarification.) After identifying these points, just plot them on the graph and label them (as shown in the first picture).

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Step-by-step explanation:

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