Posted by Katy on .
Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth.
y=2+7x
10x7y=209

Algebra 
Steve,
so, make the substitution:
10x  7(2+7x) = 209
10x + 14  49x = 209
39x = 195
x = 5
y=2+7(5) = 37