Answer:
I know right I felt like ramadan was just yesterday! You asked a question in my page but I unable to comment back to you.
3. To combine the equations and solve for one of the variables, you need to eliminate the other variable. How can you change one equation so that one variable is eliminated when the two equations are added? Explain and write the new equation. (3 points: 2 for your explanation and 1 for the equation)
4. Combine the two equations to eliminate one of the variables, and then solve for the other. (3 points: 1 for eliminating one variable, 1 for the answer, and 1 for showing your work)
5. Solve for the other variable. (2 points: 1 point for the answer, 1 for showing the work)
6. Prove that your solutions are correct by substituting the values back into the original equations and verifying the answers. (2 points)
I will answer 3,4,5 and 6 all together.
Enable to answer the question we need to follow the system of equations:
12x+6y=120 and 4x+y=30.
So now that we know our solutions we need to multiply the second equation by -3.
12x+6y=120 and -12x-3y=-90
Now we add both equations
12x- 12x + 6y- 3y= 120-90
3y=-30
y=10
This time let's find the value of "x"
4x+y= 304x+ 10= 30
4x=30-10
x= 20/4
X=5
Now that we have both values of x and y (5,10) we should make sure it's correct.
12(5)+6(10)=120
60+60=120
120=120
And
4(5)+10=30
20+10=30
30=30
Now that it's verified our final answer is (5,10).
You do A*ex schooling right? My teacher expected it because it's correct
