Question 162404
Solve the linear equation by graphing
2x-y=5 3x+y=5
y=-2x+5 y=3x-5
:
the 1st equation:
2x - y = 5
-y = -2x + 5
we must have the coefficient of y to be positive 1, multiply the equation by -1
y = 2x - 5
:
:
The 2nd equation
3x + y = 5
y = -3x + 5
:
you must change the signs when you move a term from one side to the other.
:
Graphing these:
{{{ graph( 300, 200, -2, 5, -6, 6, 2x-5, -3x+5) }}}
You can see the solution is: 2,-1