Now, to change a decimal to fraction, we use "as many zeros on the denominator as there are decimals, and lose the dot", so let's do so.
-83.2 has only 1 decimal, so we'll use one zero,
now if we divide 416 by 5, we end up with a quotient of 83, and a remainder of 1,
Answer:
(3,1) (6,-2)
Good luck on your assignment!
Since one equation has a negative y and the other has a positive y, I'm going to use those since they cancel each other out. Before that, the two y's need to be equal to each other.
x+2y=6
x-y=3
Multiply the bottom equation by two so then you have:
x+2y=6
2x-2y=6
The y's now cancel out:
x=6
2x=6
Add them together
3x=12
Divide
x=4.
To find y, plug x into either equation (*don't have to do both, but I will)
(4)+2y=6
(4)-y=3
Subtract four
2y=2
-y=-1
Divide each
2y/2 = 2/2
y=1
-y/-1 = -1/-1
y=1
The answer is:
x=4
y=1
I hope that helps!
2x + 7 = 3x - 7
3x - 2x = 7 + 7
x = 14
2x + 7 + 12y + 1 = 180
2(14) + 12y + 8 = 180
28 + 12y + 8 = 180
36 + 12y = 180
12y = 180 - 36 = 144
y = 144/12 = 12
x = 14, y = 12