Consider the equation: 2x - 6 = 5 - 3y.
It is an equation with two variables, x and y, which can be transformed into a simpler equivalent equation. Watch:
2x + 3y = 5 + 6
2x + 3y = 11 ==> Equation of the first degree in the form ax + by = ç.
We call it 1st degree equation with two variables, x and y, every equation that can be reproduced in the form ax + by = ç, being The and B non-zero numbers simultaneously.In the equation ax + by = ç, we call it:
x and y - variables or unknown The - coefficient of x | B - coefficient of y ç - independent term |
Examples:
x + y = 30 2x + 3y = 15 x - 4y = 10 | -3x - 7y = -48 2x- 3y = 0 x - y = 8 |