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
yuradex [85]
3 years ago
8

How can I solve systems of equations by substitution method

Mathematics
1 answer:
almond37 [142]3 years ago
5 0
This kind of hard to explain without an example, so I'll do my best...
All you have to do is isolate a variable on one side of the equals sign without a coefficient.  Ex:  x=2y+3  The x is all alone and ready to go into the second equation. 
Substitute into the second equation. Ex: 2x+5=3  Substitute: 2(2y+3)+5=3
I hope this helps! 

You might be interested in
Solve each system of inequalties by graphing.
nordsb [41]

Start by graphing each line.

• Because the first inequality is smaller than, it will have a dotted (- - -) line.

• Because the second inequality is smaller than or equal to, it will have a solid line (---).

Then, plug in points to see where your shading will go. If the statement is true (x = x), you will shade that area along the line.

y  < 3x + 2

(0)  < 3(0) + 2

0  <  2

0 is less than 2.

Do the same step for the other equation. Your solution to the problem is any point that lies between the shading from both inequalities (where the blue and red meet).

8 0
3 years ago
One number is 9 more than twice another. If their difference is 22, what is the larger number?
mafiozo [28]
Let, the numbers are: x, y
So, Equations will be: x - y = 22
x = 2y + 9

Substitute the value of x in first equation, 
2y + 9 - y = 22
y = 22 - 9
y = 13

x - 13 = 22
x = 22 + 13 = 35

In short, Larger number would be 35

Hope this helps!
4 0
3 years ago
What are the coordinates of a point that is 7 strides west of (2,-1)
Marat540 [252]
(-5,-1) would be the coordinates since the only thing we’re changing by moving west is that we’re subtracting from the x value. Therefore, 2-7 is -5 so we get -5,-1
4 0
3 years ago
Write the numerical expression in words two different ways. 7/ (10-3)
MissTica

Answer:

seven divided by the difference of ten and three

seven over the difference of ten and three

3 0
3 years ago
If the coordinates of point A are (-3,2) and the coordinates of point B are (7,6) the x intercept of cd is
Rainbow [258]
You have to use the equation which has just slipped my mind. It say x1-y1 over x2-y2. Then you will find x. I am so sorry this equation name slipped my mind. If I remember I will let you know.
4 0
3 years ago
Other questions:
  • At 3 p.m the temperature was 9°f by 11 pm it had dropped 31°f what was the temperature at 11 pm
    9·1 answer
  • Solving Multi Step Equations: Solve for the variable~<br>y/5 - 9 = 11
    5·1 answer
  • Help!!!!!<br> ASAP!!!!!!!
    5·1 answer
  • Help in this question please?
    10·1 answer
  • Pan make $500 each week. She puts 20% of her weekly paycheck in savings. How many does she put in savings each week
    5·1 answer
  • In the diagram, the lenght of segment BC is 23 units. What is the lenght of segment DC?
    9·2 answers
  • there are a total of 18 frocks. if the ratio of purple frocks to white frocks is 2 to 4 , how many of them are white?
    8·1 answer
  • 3) On a map of the U.S.,
    12·1 answer
  • PLEASE HELP!!! I clicked the wrong answer i think
    6·1 answer
  • REPOST !!!! Write a proportion using an unknown value x and the ratio 5 : 6. Then solve it.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!