Question 625915: Can't seem to find any 'solvers" to check for subtraction, only addition.
Please help me solve
y-3x=-4 Found 2 solutions by josmiceli, Theo:Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! You can't really solve this. Solving means that
you end up with
x = some number and
y = some number
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A general rule of equations is that in order
to solve them, the number of equations
has to equal the number of unknowns
like x, and y
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What you have is 1 equations and 2 unknowns,
so it can't be solved. What can be done is
can be found in terms of
Add to both sides
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Here's the plot of this equation:
y - 3x = -4 is your equation
apparently you want to solve for y.
if so, then this is what you do:
add 3x to both sides of this equation to get:
y = 3x - 4
you have just solved for y.
asuming you had wanted to solve for x instead, this is what you do:
equation is:
y - 3x = -4
subtract y from both sides of the equation to get:
-3x = -y - 4
divide both sides of the equation by -3 to get:
x = y/3 + 4/3
your 2 equations are:
y = 3x - 4
x = y/3 + 4/3
when x = 1:
y = 3x - 4 yields y = 3 - 4 = -1
when y = -1:
x = y/3 + 4/3 yields x = -1/3 + 4/3 = 3/3 = 1
the 2 equations are equivalent too each other.
y = equation solves for given values of x.
x = equation solves for given values of y.
