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
trasher [3.6K]
3 years ago
9

Solve by using substitution x=3y-1 x+2y=9

Mathematics
1 answer:
kogti [31]3 years ago
3 0

Answer:

x=3y−1x=3y-1

x+2y=9x+2y=9

Replace all occurrences of xx with 3y−13y-1 in each equation.

Tap for fewer steps...

Replace all occurrences of xx in x+2y=9x+2y=9 with 3y−13y-1.

(3y−1)+2y=9(3y-1)+2y=9

x=3y−1x=3y-1

Add 3y3y and 2y2y.

5y−1=95y-1=9

x=3y−1x=3y-1

Solve for yy in the first equation.

Tap for fewer steps...

Move all terms not containing yy to the right side of the equation.

Tap for fewer steps...

Add 11 to both sides of the equation.

5y=9+15y=9+1

x=3y−1x=3y-1

Add 99 and 11.

5y=105y=10

x=3y−1x=3y-1

Divide each term by 55 and simplify.

Tap for fewer steps...

Divide each term in 5y=105y=10 by 55.

5y5=1055y5=105

x=3y−1x=3y-1

Cancel the common factor of 55.

Tap for fewer steps...

Cancel the common factor.

5y5=1055y5=105

x=3y−1x=3y-1

Divide yy by 11.

x=5,y=2

Step-by-step explanation:

please mark me as brainliest thank you

You might be interested in
=
sergiy2304 [10]

Answer:

  Q, R

Step-by-step explanation:

All of the listed sets of numbers are Real numbers. The fraction is not an integer, so is not in sets I or N. Because it is a fraction, it is in set Q, and because R includes Q, ...

  the number is in sets Q and R

8 0
3 years ago
How do I simplify 4 over 12 times 8 over 20
garri49 [273]

4 over 12 times 8 over 20

= 4/12 * 8/20 ....( 4/12 = 1/3;   8/20 = 2/5)

=1/3 * 2/5

=2/15

4 0
3 years ago
QUICK WHAT IS:which expression represents a factorization of 32m + 56mp
Anna71 [15]
Simplifying that expression will be
32m + 56mp = 8m (4 + 7p)
5 0
3 years ago
Write the equation of the line passing through the points (6,2) and (-2,-2). The equation of the line is [] Please helppp!!
AURORKA [14]

Answer:

Step-by-step explanation:

slope=(-2-2)/(-2-6)=-4/-8=1/2

eq. of line is

y-2=1/2(x-6)

2y-4=x-6

2y=x-6+4

2y=x-2

or y=1/2x-1

4 0
2 years ago
explain how to use estimation to help find the product of two decimals. give an example with both estimated and actual answer
Marrrta [24]

To find the product of a reasonable estimate of two decimal numbers, round each decimals to the nearest whole number and then perform the multiplication.

For example:

3.2 x 5.7

Estimated answer

3.2 will be rounded down to 3 and 5.7 will be rounded up to 6

⇒ 3 x 6 = 18

Actual Answer

3.2 x 5.7

=18.24

7 0
1 year ago
Other questions:
  • What does ‘x’ equal
    5·1 answer
  • A bag contains 15 marbles. The probability of randomly selecting a green marble is . The probability of randomly selecting a gre
    8·2 answers
  • Help me which one is it (plz) I’ll give you 10 points
    5·2 answers
  • Samuel pays $59.99 plus $0.25 for each minute over 450 minutes for his cell phone plan. Monica
    12·1 answer
  • Write an equation of the line in slope-intercept form.
    12·1 answer
  • Mr. Mohammed withdraw a sum of money from the bank. He gave 3/8 to his son and 1/4 to his daughter. If he had GHc 600 left, how
    8·1 answer
  • What is an equivalent ratio of 5:9
    13·2 answers
  • 2 different ways to construct congruent angles
    8·1 answer
  • Add the two expressions.<br><br> 3x + 7 and 9x−2
    8·2 answers
  • Find the value of x please.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!