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
aev [14]
3 years ago
8

2x+y=21;y=-2x+21please hurry I need this straight away​

Mathematics
1 answer:
Nastasia [14]3 years ago
7 0

Step-by-step explanation:

2x + y = 21

Solving

2x + y = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1y' to each side of the equation.

2x + y + -1y = 21 + -1y

Combine like terms: y + -1y = 0

2x + 0 = 21 + -1y

2x = 21 + -1y

Divide each side by '2'.

x = 10.5 + -0.5y

Simplifying

x = 10.5 + -0.5y

You might be interested in
Find the value (18 9) / 3d for d=3
Alexeev081 [22]
Assuming that you ment- (18*9)/3d where d=3 you would follow PEMDAS-
Parentheses
Exponents
Multiplication-Division (in order from right to left)
Addition-Subtraction (in order from right to left)
1. Parentheses- (18*9)=162
2. Solve your variables- 3d (3*3)=9
Giving you- 162/9
3. Solve-162/9=18
7 0
3 years ago
HELP PLEASE THANK YOU
pochemuha

Answer:

hiiiiiiiiiiii I like uiuuuuuus

8 0
2 years ago
Factor completely.<br> 18x10-2
kow [346]

Answer:

178

Step-by-step explanation:

7 0
3 years ago
Yolanda made $192 for 12 hours of work. At the same rate, how many hours would she have to work to make $272?​
denpristay [2]

Answer:

17 hours

take $192 and divide it by 12 so you know how much they make per hour

$192 / 12 = 16

then you're going to take $272 and divide it by what you know now - how much they make per hour (this will get you how many hours they worked)

$272 / 16 = 17

6 0
2 years ago
2. Jon is firing his slingshot towards a tree, when suddenly gravity on the earth disappears.
Yuliya22 [10]

Answer:

im not sure you wrote the awsner right

4 0
3 years ago
Other questions:
  • What is the difference between 5 times a number and 10 is 0
    13·2 answers
  • 1+1 please mark me as brainliest as i am giving free points out
    11·2 answers
  • What are 2 numbers that round to 264.5 when rounded to the nearest tenth
    14·2 answers
  • Maya reads that 0.63 of Oak School is female and 0.47 of Elm School is female. She says that Oak School must have more females.
    9·1 answer
  • What is the surface area of the pyramid?<br><br> 24.9 m2<br> 55.7 m2<br> 75.7 m2<br> 105.4 m2
    6·2 answers
  • Solve for x in the following equation.
    12·1 answer
  • Grace cut 3 pieces of ribbon; each piece was 2/5 of a foot long.How many feet of ribbon does she have in all?
    14·1 answer
  • Please help :DDDDDDD
    9·1 answer
  • √4x-4=√5x-1−1.<br> there's 2 answers apparently
    9·1 answer
  • Joe needs to get to his house, which is 106 miles away in 2 hours. How fast does he need to drive? 48 mph 104 mph 0.019 mph 53 m
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!