y=-2x+1 2x-2y=4. How do I solve for the x?

Answer 1

y = -2x + 1 -----(equation 1)

2x-2y=4

=> 2y=2x-4

=> y = x - 2-----(equation 2)

so, we can just say y = y and put the values from each equation.

-2x + 1 = x - 2

=> -3x = -3

=> x = 1

Answer 2

Rewrite the first equation as

2x + y = 1

2x-2y=4

Subtract the 2nd equation from the first

3y=-3

y=-1

Put the value of y into the 1st equation to get x.