Question
Which is the correct step in the following system of equations when solved by substitution?
x + 3y = 7
2x - 4y = -6
a. 2 ( - 3y - 7) - 4y = - 6
b. 2 ( 3y - 7) - 4y = -6
c. 2 ( - 3y + 7) - 4y = -6
d. 2 ( 3y + 7) - 4y = - 6
x + 3y = 7
2x - 4y = -6
a. 2 ( - 3y - 7) - 4y = - 6
b. 2 ( 3y - 7) - 4y = -6
c. 2 ( - 3y + 7) - 4y = -6
d. 2 ( 3y + 7) - 4y = - 6
Answers
mathhelper
from
x + 3y = 7
x = -3y + 7
sub into
2x - 4y = -6
2(-3y + 7) - 4y = -6
mmmhhhh?
x + 3y = 7
x = -3y + 7
sub into
2x - 4y = -6
2(-3y + 7) - 4y = -6
mmmhhhh?