Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).

x + 2y = 7
2x + y = 8

Question

Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).

    x + 2y = 7
    2x + y = 8

unklerhaukus · Answer

solve the first equation for $x$ by taking away $2y$ from both sides
 now you have $x=...$

substitute this into  the second equation 
$$2(...) + y = 8$$

and solve for $y$,

the solution is $(x,y)$

anonymous · Answer

^(or solve for x in the 2nd equation and substitute the x back into the first equation)

x = -1/2y + 4     --------------> substitute back into the first equation.

unklerhaukus · Answer

that works too,

fellowroot · Answer

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