posted by Donna on .
I need to know if I am doing this problem right when sustitution method.
now add the two equation
the answer would be -4y=7
then divided -4=7 answer 1.75
I no that there is more to this answer I am just stuck and not sure if this is right are not.
You are not doing substitution.
y = 3 - 2x
y + 2x = -4
Substitute 3 - 2x for y in second equation and solve for x. Insert that value into the first equation and solve for y. Check by inserting both values into the second equation.