Answer:
Step-by-step explanation:
I'm thinking this is what the problem looks like:
. The first thing to do is to move the
over to the other side because it has a common denominator with the other side. Doing that and at the same time combining them over their common denominator looks like this:
. The best way to solve for x now is to cross-multiply to get 3(4-x)=-4(x-4). Distributing through the parenthesis is 12 - 3x = -4x + 16. Solving for x gives us x = 4. Of course when we sub a 4 back in for x we get real problems, don't we? Dividing by zero breaks every rule in math that there ever was! So, yes, the solution is extraneous.
You can isolate y and you know that the slope is the number in front of x (the one that multiplies it)
You know that the y-intercept is the value of y when x=0, therefore you can find y by replacing x with 0 in the equation
1-equation
5x-8y=3
5x=3+8y
5x-3=8y
(5x-3)/8=y
y=(5/8)x -3/8
(Slope = 5/8)
2- y-intecept (x=0)
y=(5/8)(0)-3/8
y=-3/8
Answer: 4 1/5
Step-by-step explanation:
Rewriting our equation with parts separated
=2 + 3/5 + 1 + 3/5
Solving the whole number parts
2 + 1= 3
Solving the fraction parts
3/5 + 3/5 = 6/5
Simplifying the fraction part, 6/5,
6/5 = 1 1/5
Combining the whole and fraction parts
3 + 1+ 1/5 = 4 1/5
Solution by Formulas
converting mixed numbers to fractions, our initial equation becomes,
13/5 + 8/5
Applying the fractions formula for addition,
=(13 × 5) + (8 × 5)/5 × 5
=65+40 / 25
=105/25
Simplifying 105/25, the answer is
=4 1/5
