Well, isn't that a happy little math problem we have here? To solve 3x + 5y, you just need to combine like terms. You can't add x and y together, so the expression stays as 3x + 5y. Just remember, there are no mistakes in math, only happy little accidents!
3x/7 + 5y/14x = 3x*2x/(7*2x) + 5y/14x = (6x2 + 5y)/14x
(6x - 5y) + (-3x - 4y) =6x - 5y - 3x - 4y =3x - 9y =3 (x - 3y)
3x - 8y + 2x - 5 - 5y = 5x -13y - 5
X = -2(13 + y) / 3x = 5y / 4 - 1
-3x = 3 + y 3 + y - 5y = -21 -4y = -24 y = 6 x = -3
The Abelian property or commutativity.
To solve for two unknowns (x and y) you need two independent equations. All that you can do with the above is to express x in terms of y, as follows: 3X + 5Y = 7 => 3X = 7 - 5Y or X = (7 - 5Y)/3 or you can express y in terms of x: Y = (7 - 3X)/5
3x+5y+8x+2y combine 3x and 8x to get 11x 11x+5y+2y combine 5y and 2y 11x+7y is the answer.
3x+5y=48 5y=48-3x-3x+5y=12 -3x+(48-3x)=12-6x=-36x=65y=48-3(6)5y=30y=6(6,6)
It is: 7x+10y
3X = 15 + 5y does not have a single answer. The answer forms a line on the Cartesian plane. In order to reach a single solution you must have two equations when there are two unknowns.
3x/7 + 5y/14x = 3x*2x/(7*2x) + 5y/14x = (6x2 + 5y)/14x
3x-5y=15 The equation-5y=15-3x Subtract 3x from both sidesy=-3+.6x Divide both sides by -5
(6x - 5y) + (-3x - 4y) =6x - 5y - 3x - 4y =3x - 9y =3 (x - 3y)
That simplifies to 3x - 9y. It can't be solved since it doesn't equal anything.
Because of the limitations of the question software, it was not possible to determine what the original equation was supposed to be, so we assumed it is 3x + 5y = 7. It could have just as easily been 3x - 5y = 7, or even 3x/5y = 7.So, let's solve them all for x.3x + 5y = 73x = 7 - 5yx = (7 - 5y)/3How about 3x - 5y = 7?3x - 5y = 73x = 7 + 5yx = (7 + 5y)/3And 3x/5y = 7?3x/5y = 73x = 35yx = 35y/3 Solving for y The above equations wrote the equation so that x is a function of y, not the other way around. Here's how to rewrite the equation so that y is a function of x: 3x + 5y = 7 5y = -3x + 7 y = (-3x + 7)/5
x=(-5y-1)/3