how do you rearrange the equation 2x+y=6 and the equation -3x+4y+5=0 into standard form.

If by standard form you mean y = m x + b, where m and b are constants, then:

(1) substitute 2x from both sides of the fist equation.

(2) Add 3x - 5 to both sides of the second equation, which will give you
4y = 3x - 5 ,
and then divide both sides by 4