Question

Which equation is in standard form?

Answer 1

Standard form is ax+by=c where a, b, and c are integers and a is never negative

see all of them

first one
3x+4y=10
nothing wrong

2nd one
19+3y=2x
wrong, x and y have to be on same side

3rd one
7y-7x=8
x has to be positive 

4th one
8+5x=3y
x and y have to be on the same side

answer is the first one: 3x+4y=10

Answer 2

3x+4y=10 is in standard form. The standard form is Ax+By=C and this equation suits that form with A as 3, B as 4, and C as 10.