Considering these two equations:
y - 2x = 25
19y + 10x = 25
Which expression can be substituted for y
in the bottom equation of the system to
solve the system by substitution?
The first one can be substituted for y, when you add 2x to both sides. At the end you’ll have y = 2x + 25 which can be substituted in the second equation for y.
