When you are substituting equations, all you are doing is plugging in variables. Lets do an example..something random but easy...
y = 2x - 3
4x + 2y = 10
So since 2x + 3 equals y we are going to plug in those numbers into the second equation.
4x + 2(2x - 3) = 10
Now we distribute
4x + 4x - 6 = 10
Combine like terms.
8x - 6 = 10
Add 6 to both sides.
8x = 16
Divide.
x = 2
And thats how you substitute equations.
I hope this helps love! :)
Answer:
35 degree celcuis
Step-by-step explanation:
Im pretty sure the answer is 2x^3-x^2+13x-6/x-3
Less, 12 x 3/4 is 9 as you take 12/4 which is 3 times 3, which gives you 9
