Question

2x-5y = 10

Solve for X
ok first i add 5y on both sides
so i get
2x = 10 + 5y
then i divided 2x on both sides
so i get
x = 10 + 5y / 2x
but how am i supposed to divide 10/2x and 5y/2x when they’re different variables??
someone please explain.

Answer 1

x = 5 + 5y/2

Explanation:

When you get to 2x = 10 + 5y,

you should divide both sides with 2 only instead of 2x. Because if you divide 2x on both sides, the left side would only remain 1 (since 2x/2x = 1)

2x = 10 + 5y

x = (10 + 5y) / 2

x = 10/2 + 5y/2

x = 5 + 5y/2 .( or 5 + (5/2)y)

Answer 2

Hey there!

2x-5y=10

Add 5y on both sides to get: 2x=10+5y

Divide by 2, not 2x. This will isolate the x.

x=5+2.5y

x=2.5y+5

Hope this helps :)