3X+2Y=6
3X+1Y=5
Those are linear equations.
we can solve by elimination method.
3X+2Y=6
3X+1Y=5
⇒Y=1
∴X=4/3
Answer:
16 pieces of pizza when the pizza was whole.
Step-by-step explanation:
You know that 6 pieces are equal to 3/8 of the pizza.
Let x represent the total number of pieces and write an equation:
3
-- times x = 6
8
Multiply each side of the equation by 8:
8 times 3
-- x = 8 times 6
8
3x = 48
Divide each side of the equation by 3:
3x 48
--- = ---
3 3
x = 16
[8/(2x-2)=(8+6)/(3x)
8/(2x-2)=14/(3x)
14(2x-2)=8(3x)
28x-28=24x
x=7
So by using the similarity of the sides, we can make ratios that can give is the value of x.<span />
Answer:
6
Step-by-step explanation:
3 1/2 = 3.5
21/3.5 = <u>6</u>
Answer:
y = 5/3 x + 4
Step-by-step explanation:
To find the inverse, interchange the x and y variables and solve for y. (that might sound a bit confusing, but don't worry! :)
Our current function is f(x) = 3/5 (x-4). Let's make f(x) = y, so the function is y = 3/5 (x - 4).
Now, switch the x and y variables. x = 3/5 (y - 4).
Now, just solve for y!
x = 3/5 y - 12/5
5x = 3y - 12
5x + 12 = 3y
3y = 5x + 12
y = 5/3 x + 4
hope this helps! <3