3 years ago

7x+6y=21 X+3y=-12 what is the answer

1 answer:

7 0

7x + 6y = 21 ⇒ 7x + 6y = 21
1x + 3y = -12 ⇒ 2x + 6y = -24
5x = 45
5 5
x = 9
  x + 3y = -12
  9 + 3y = -12
  - 9   - 9
3y = -21
3   3
y = -7
      (x, y) = (9, -7)

You might be interested in

How do i show the substitution method to solve x=5y-7 and 3y+2y=12

Katena32 [7]

Answer:x=-20 y=4

Step-by-step explanation:

5 0

3 years ago

What's the word form and value of 3.100

BlackZzzverrR [31]

Three and one tenth. The zeros on the end don't mean anything.

7 0

4 years ago

If a rectangular. Prism. Has 5cm. 10cm on one side and 4cm on the. Other. What is the volume of the rectangle?

emmasim [6.3K]

Answer: $200\ cm^3$

Step-by-step explanation:

Given

The dimension of the rectangular prism is

$l=5\ cm\\w=10\ cm\\h=4\ cm$

The volume of the prism is given by $V=l\times w\times h$

$\Rightarrow V=5\times 10\times 4\\\Rightarrow V=200\ cm^3$

Therefore, the volume of the prism is $200\ cm^3$ .

7 0

2 years ago

Write an expression for the calculation 2/3 times the sum of 2/8 and 4/8

zubka84 [21]

2/3(2/8 + 4/8) = 2/3(1/4 + 1/2)
2/3(3/4) = 1/2

5 0

3 years ago

Anybody solve this i made it its easy<br> 3(55x2) + 9 + 44 +88 x 9 = your number + 163593

olga55 [171]

Answer:

165*6+53+792= 990+845 = 1,835

Step-by-step explanation:

4 0

3 years ago