8x + 3y = 20.50
-
4x+5y=22.50
=
4x-2y=-2, so you have to divide each number by 2, then
2x-y=-1, so
-y=-1-2x /-1, y=1+2x, then replace it with one original equation like the first one for instance:
8x+3(1+2x)=20.50, then
8x+3+6x=20.50, then
14x=20.50-3
14x=17.5
x=1.25, then solve y:\
y=1+2*(1.25)
y=1+2.5
y=3.5,
So answer is x=1.25, and y=3.5
Answer:
x=5
Step-by-step explanation:
First you need to combine the like terms. Add the two x-terms together and you get 8x, then subtract 8 from both sides of the equation. You now have 8x=40. Just divide each side by 8 and you end up with x=5.
If you are using a calculator, simply enter 16×100÷40, which will give you the answer.
Answer:
x is 135°
Step-by-step explanation:
They are both the same angle.
Answer:
18.2+8.5=26.7
Step-by-step explanation: