1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Helen [10]
3 years ago
13

-3x+3y=9 2x−7y=−14 ​

Mathematics
1 answer:
nignag [31]3 years ago
6 0
Step: Solve
−
3
x
+
3
y
=
9
for x:
−
3
x
+
3
y
=
9
−
3
x
+
3
y
+
−
3
y
=
9
+
−
3
y
(Add -3y to both sides)
−
3
x
=
−
3
y
+
9
−
3
x
−
3
=
−
3
y
+
9
−
3
(Divide both sides by -3)
x
=
y
−
3

Step: Substitute
y
−
3
for
x
in
2
x
−
7
y
=
−
14
:
2
x
−
7
y
=
−
14
2
(
y
−
3
)
−
7
y
=
−
14
−
5
y
−
6
=
−
14
(Simplify both sides of the equation)
−
5
y
−
6
+
6
=
−
14
+
6
(Add 6 to both sides)
−
5
y
=
−
8
−
5
y
−
5
=
−
8
−
5
(Divide both sides by -5)
y
=
8
5

Step: Substitute
8
5
for
y
in
x
=
y
−
3
:
x
=
y
−
3
x
=
8
5
−
3
x
=
−
7
5
(Simplify both sides of the equation)

Answer:
X=-7/5 and y= 8/5
You might be interested in
On cold days Leah likes to make hot chocolate. She uses 8 tablespoons of cocoa and 2 tabelspoons of sugar, what ratio is equival
galben [10]

Answer:

4 to 1

Step-by-step explanation:

The greatest common factor between 8 and 2 is 2. So 2 will go into 8, 4 times. And 2 will go into 2, 1 time. So simplified the equivalent ratio is 4:1.

8 0
3 years ago
50 is 40% of what number
notsponge [240]
125
50=40%
25=20%
125=100%
3 0
4 years ago
Read 2 more answers
Amina was asked to write the prime factorization of 525
ioda

Answer:

Prime factorization of 525 is 3×5×5×7

6 0
3 years ago
Read 2 more answers
Tom bought n DVDs for a total cost of 15n - 2 dollars. Which expression represents the cost of each DVD?
Gala2k [10]

A. n ( 15.n - 2 )

eg n = 2

2 ( 15.2 - 2)

2 ( 30 - 2)

2 (18)

36 = 18 + 18

3 0
3 years ago
Find the annual interest rate if i=$562.50, p=$1500, t=5 years
aniked [119]
I=prt. Sub in what you know: 562.50=1500(r)(5). Multiply: 562.5=7500r. Divide to get the unknown by itself: .075=r or 10%=r. :)
5 0
3 years ago
Read 2 more answers
Other questions:
  • The length of a rectangular field is 24 meters. This is 3 meters was than twice the width. Find the width.
    12·1 answer
  • All the angles in a rectangle are right angles. ABCD is a rectangle. Using deductive reasoning, what can we conclude?
    8·1 answer
  • A ramp has a horizontal distance of 10 feet and a vertical rise of 3 feet. Find the length of the ramp. Round to the nearest ten
    15·2 answers
  • A farmer needs to enclose three sides of a field with a fence (the fourth side is a river). The farmer has 49 yards of fence and
    6·1 answer
  • Which expression is equivalent to the fifth power of (5 + 7)"?<br> ​
    15·1 answer
  • 64 is 4 times the difference between Sarah's age, a, and 44. Assume Sarah is older than 44. (pls show an equation to determine S
    8·1 answer
  • How do i get 51 with the numbers 5, 6, 7, 8? Must use all of the numbers and only can use addition, subtraction, multiplication,
    5·1 answer
  • Solve for x,then find the measure of the angle given
    15·1 answer
  • Guys im not in high school im in middle school
    14·2 answers
  • 2 ACTIVITY: Estimating a Whole
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!