Question

Which of the following equations is written in standard form?
-2x=13
3x+5y=-15
1/2 x + 1/3 y =1/5
-3x+13y =25

Answer 1

the variables in alphabetical order on the left side of the =
no fractions
first term is positive

Answer 2

so which one is it?

Answer 3

do you see any choices where the first term is negative ?
those are NOT the answer.

Answer 4

you have to answer this by the process of elimination.

Answer 5

the second one?

Answer 6

the first choice is wrong (negative first term)
so it the last for the same reason
the third choice has fractions. Fractions are not allowed.
that leaves just the second choice.

Answer 7

ah! okay! so I was right :) hehe thank you~