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Savatey [412]
3 years ago
9

What is the value of 5x−2y=305

Mathematics
1 answer:
sammy [17]3 years ago
6 0

Answer:

x  = 61   y = 0

Step-by-step explanation:

5x − 2y = 305

-5x            -5x              Subtract 5x from both sides

-2y = -5x + 305            Divide both sides by -2

y = 2.5x - 152.5

A possible solution is x  = 61   y = 0

If this answer is correct, please make me Brainliest!

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the sum of three numbers is 79. The second number is 5 times the first, while the third is 16 more than the first. Find the Numb
faust18 [17]
Let the 1st number be x; 2nd number be y; 3rd number be z.

x + y + z = 79

x = number we are looking for.
y = x * 5 ==> 5 times the first
z = x + 16 ==> 16 more than the first

Therefor,

x + (x * 5) + (x+16) = 79

1st step, multiply the 2nd number: x * 5 = 5x

x + 5x + x + 16 = 79

Add all like numbers:

7x + 16 = 79

To get x, transfer 16 to the other side and change its sign from positive to negative.

7x = 79 - 16
7x = 63

To get x, divide both sides by 7

7x/7 = 63/7
x = 9

To check. Substitute x by 9.

x + (x * 5) + (x+16) = 79

9 + (9 * 5) + (9 + 16) = 79
9 + 45 + 25 = 79
79 = 79 equal. value of x is correct.

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