which of the following mathematical statements show a linear equation or inequality in two variables? write LE if it is linear equation and LIE if it is linear inequality in two variables. _1. [tex]2x + y = 6[/tex] _2. [tex]x > 2y + 3[/tex] _3. [tex]y < 3x[/tex] _4. [tex]2x = y - 1[/tex] _5. [tex]2(x - 1) \geqslant y[/tex]