If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

x + y = 2
3x + 2y = 9

Question

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

x + y = 2
3x + 2y = 9

anonymous · Answer

from first equation.......
y=x-2
put in 2nd equation:;
3x+2(x-2)=9
3x+2x-4=9
5x=13
x=13/5

so,y=(13/5)-2
      =3/5

campbell_st · Answer

slight correction 

from the 1st equation 

the equivalent to x is 

x = 2 - y

then substitute into the 2nd equation 

3(2 - y) + 2y = 9

6 - 3y + 2y = 9

-y + 6 = 9

solve for y

usukidoll · Answer

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