Question

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

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

Answer 1

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 \((x,y)\)

Answer 2

^(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.

Answer 3

that works too,