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
I need to know the answer I’m working on rational numubers
lesya [120]

Answer:

Fraction Form: \frac{11}{24}

Decimal Form: 0.4583

Step-by-step explanation:

Apply the fraction rule: \frac{-a}{b} = - \frac{a}{b}

\frac{-5}{12} = - \frac{5}{12}

- \frac{5}{12} + \frac{7}{8}

Least Common Multiple (LCM) of 12 and 8: 24

- \frac{5}{12} x  \frac{2}{2} = - \frac{10}{24} \\\\\frac{7}{8} x  \frac{3}{3} = \frac{21}{24} \\\\- \frac{10}{24} + \frac{21}{24}

Apply the fraction rule:

\frac{a}{c} + \frac{b}{c}= \frac{a + b}{c}\\\\\frac{-10 + 21}{24} \\\\-10 + 21 = 11\\\\\frac{11}{24}

3 0
2 years ago
How many 3/4 cup servings are in 7/8 cup of pudding
inysia [295]

Answer:

Step-by-step explanation:

7/8 ÷ 3/4 is the same as saying 7/8 • 4/3

answer: 1.2 or 1 1/5 or 6/5

8 0
3 years ago
Write the exponential form of 6,985,062 using exponential form
Anestetic [448]
U can find this on safari but if u cant reply to my comment and i’ll help u
3 0
3 years ago
Rewrite the expression using the distributive property. 8(4x+6y-3z)
Umnica [9.8K]
All you need to do is distribute the 8 into each of the terms in the parenthesis.

Your equation will then become

32x + 48y - 24z
8 0
3 years ago
Read 2 more answers
The formula for a trapezoid relates the area A, the two bases, a and b, and the height, h.
Mila [183]

Answer:

a =  \frac{a - 12bh}{12a}

4 0
3 years ago
Other questions:
  • Factor this trinomial. Your answer should consist of two binomials.
    11·1 answer
  • Give two details to support this statement: Keeping your nails trimmed to the right length is important. BTW in the picture ther
    10·1 answer
  • 98 PTS!<br> Can someone please help?
    11·2 answers
  • Suppose you invest $1400 at interest rate of 4.3% compounded continuously. How much will you have in the account after 7 years?
    12·1 answer
  • You are given a 16-bit binary integer X= (1110 0100 0111 1010)2 . Convert X to decimal if:
    15·1 answer
  • What are the coefficients of 8+5x-y
    6·2 answers
  • Is x^2+y^2=5 a function? why or why not?
    12·1 answer
  • What is 6x(-496)=19x12
    7·1 answer
  • Please help! Geometry
    11·1 answer
  • Greatest percent
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!