mimi0524 mimi0524

20-11-2014
Mathematics

contestada

Solving systems by substitution :
y=5x-10
y=3x+8

I dont underatand how to solve it

Respuesta :

20-11-2014

-2 i think all you have to do is 5x divided each side 5x divide by 10=- 2

Answer Link

VivianW VivianW

20-11-2014

Because they both equal 'y' you can make them equal to each other.
5x-10=3x+8
-Add 10 on both sides-
5x=3x+8+10
-Minus 3x on both sides-
5x-3x=18
2x=18
-Divide by 2-
x=9

Answer Link

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