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
Paul [167]
3 years ago
14

7x+3y=22 4y=20 I need to know how to write this equation out with the answer

Mathematics
2 answers:
xeze [42]3 years ago
5 0
7x+3y=22
4y=20

4y=20
y=5

Substitute to first equation
7x+15=22
7x=7
x=1
WITCHER [35]3 years ago
3 0
\begin{cases} 7x+3y=22 \\ 4y=20 \ \ /:4 \end{cases}\\ \\\begin{cases} 7x+3 \cdot 5=22 \\ y= 5 \end{cases}\\ \\\begin{cases} 7x+15=22 \ \ |-15 \\ 4y=20 \end{cases}

\begin{cases} 7x+15 -15=22 -15 \\ y=5 \end{cases}\\ \\\begin{cases} 7x =7\ \ / :7 \\ y=5 \end{cases}\\ \\\begin{cases} x =1 \\ y=5 \end{cases}\\ \\


You might be interested in
Is 5.67 A)rational B)Irrational C)whole D) natural E)integer
Alexxx [7]
Rational it stops and repeats
5 0
2 years ago
Jane made a door frame for the house but does not have a tool to measure the angles. How can she check that the corner is 90 deg
Ainat [17]

The door frame is a rectangle. The diagonals of a rectangle are congruent. She can measure the two diagonals and make sure they are congruent.

3 0
2 years ago
Read 2 more answers
Kim sells flowers in 25 pound crates to the flower mart if she sells 100 crates how many pounds of flowers does she sell
Kisachek [45]

25*100

2500 lbs of flowers will be sold

8 0
3 years ago
write the polynomial in standard form. then name the polynomial based on its degree and number of terms. 7g - 8g^3 5g^2 - 1 a) -
Daniel [21]
-8g^3 + 5g^2 + 7g - 2; cubic polynomial
7 0
3 years ago
The function rule for the following graph is y = 2x + 2. What is the value of y in the ordered pair (2, y)? 24 4 10 6
Phantasy [73]
I think the answer is 6
6 0
3 years ago
Other questions:
  • Final the total cost. Purchase price = $2615 ; tax rate = 3%
    8·2 answers
  • On a test hailey answered 64 out of 75 questions correctly. What percent of her answers were correct? With the work please!!
    7·2 answers
  • How do you solve k/2+9=30
    11·2 answers
  • The yearbook club is handing out T-shirts to its members. There are 5 blue, 7 green, 9 red, and 4 yellow T-shirts in all. If Jac
    11·1 answer
  • Laura is saving money to buy a game. The game cost $36, and so far she has saved three- fourths of this cost. How much money has
    15·1 answer
  • Evaluate the expression for x=1 and y=9<br> 3x+y=
    5·2 answers
  • Help pls I give brainlest
    6·1 answer
  • After riding a bike for 20 min you burn 190 calories. If you ride the bike for 45 minutes how many calories will you burn? Use a
    14·1 answer
  • Find each measure! Please please help me!!! 40 points!! No files!!!
    11·1 answer
  • CAN SOMEONE PLS HELP ME WITH THIS ONE??!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!