tx/3+y/5=1 can be solved for y so it can be put into a graphing calculator.
Multiply each term by the lowest common multiple of the denominators, 15.
It gives you 5x+3y=15
Then subtract 5x from both sides.
3y=-5x+15
Divide each term by 3.
y=-5/3 x+5
This is slope intercept form.
Crosses y axis at 5 with a slope of -5 over 3.
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X=1
x=-1 ^ how do you know?
2x+1 = 9 2x = 9-1 2x = 8 x = 4
You cannot solve 1 linear equation in 2 unknown variables. You need at least two independent equations.
x = 3.5