Question

solve each system by substitution
Please show how you got it and also how you found Y... Thanks :)
7x+2y=-6
-14x-4y=-2

Answer 1

7x=-2y-6 (set the first equation in terms of x)
-2(-2y-6)-4y=-2 (plug in the top equation to the bottom, we know that 7 goes into -14 -2 times)
4y+12-4y=-2 (simplify, a negative multiplied by a negative equals a positive)
12=-2 (add the y's)
we have a problem here, 12 does not equal to -2, so the system has no solution. :)

Answer 2

Thanks :)