Help!!!!
If the system of equations given below is solved using the substitution method, what is the equation that results from both solving the first equation for x, and substituting into the second equation?

x - 7y = 10

2x + 4y = 15
18y = -5
x = 7y + 10
-10y = -5
18x = 145

Question

Help!!!! 
If the system of equations given below is solved using the substitution method, what is the equation that results from both solving the first equation for x, and substituting into the second equation?

x - 7y = 10

2x + 4y = 15
       18y = -5
       x = 7y + 10
       -10y = -5
       18x = 145

anonymous · Answer

does anyone know I am stuck ?

jim_thompson5910 · Answer

solve the first equation for x to get

x - 7y = 10

x = 10+7y

then plug this into the second equation

2x + 4y = 15

2(10+7y) + 4y = 15

20+14y+4y = 15

20+18y = 15

I'll let you finish