Note to the first anon.

You are right there can only be one equal sign per equation.

There are actually 2 equations here. It would have been better if they had been put on different lines or seperated more so that it was more obvious.

You can only solve a single equation if you have only one unknown.

But if you have 2 equations that get solved 'simultaneously' then you can have 2 unknowns.     

I dont think this question is ligit because you cant have more than one equals sign in a single math line.  6x+2y=2 5x-7y=6

This is asking:

6 x ? + 2 x ? = 2

First work that out.

Then work out this:

5 x ? + 7 x ? = 6

Then you have to make sure that you used the same two numbers for '?' in both lines.

That makes both lines true, and solves the equation.

This is asking to solve this system.....   6x+2y=2    5x-7y=6      ....divide the first equation by 2.... this gives 3x + y = 1    rearrange       y = 1 - 3x    .......and subbing this into the second equation, we have ......

5x - 7(1 - 3x) = 6     simplify

5x - 7 + 21x  = 6       add  7 to both sides and simplify the left hand side

26x = 13       divide both sides by 26

x = 13/26 = 1/2 and   y =  1 - 3(1/2)   =   1 - 3/2  = -1/2