Where did he go?
]]>We would like to subtract or add the bottom equation from the top one and make one variable disappear. But when I do that 2x - 3x = x, that did not disappear and y + (-2y) = y so no luck there either.
If I multiply the top equation by 3 I get
Now if I multiply the second equation by 2 I get
So I have changed the equations again to
]]>how do you think what to add or not?
Just trying to get it into the form of all the variables on the left and all the numbers on the right so we can make the next bunch of moves.
]]>Clean this one up a bit by subtracting x from both sides.
Clean up the second one
Add 2x to both sides
Subtract 2y from both sides.
Add one to both sides
We now have
Did you follow up to here?
]]>Form the simultaneous set:
Do you know how to solve that?
]]>sorry h is mistake , h is nothing
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