How to solve 3x + y = 36 5x + y = 56

Mathematics

1 answer:

monitta3 years ago

7 0

Hello from MrBillDoesMath!

Answer: x = 10, y = 6

Discussion:

Subtract the second equation from the first equation:

3x + y = 36

-5x - y = - 56 (subtraction is same as adding negative)

-------------------------

(3x - 5x) + ( y-y) = 36 - 56 or

-2x + 0 = -20 or

x = -20/(-2) = + 10

Substituting "x" value in 3x + y = 56 gives

3(10) + y = 36 or

30 + y= 36 or

y = 36 - 30 = 6

Thank you,

MrB

You might be interested in

Evaluate. 43⋅(10025)−50

Roman55 [17]

The dot means to multiply
so 43 x 10025 -50
since BEDMAS is applied,
we would do the multiplication first
43 x 10025 = 431075
and <span>431075 - 50 is 431025
FINAL ANSWER: 431025</span>

8 0

3 years ago

Read 2 more answers

Help me with this please?

aleksandrvk [35]

Answer:

$\sqrt{51}$ or 7.14

Step-by-step explanation:

Using the Pythagoras theorem, we can conclude the formula that we are going to use here is $a^{2}+b^{2} = c^{2}$

As we can see, this is a right triangle given that it has the square in the corner there. With this information, we can conclude that the longest side is 10, making it the hypotenuse or $c$