Question

X = -2y + 300
3y = 800 - 4x

Answer 1

y=80, x=140

Explanation:

When you solve with subsitution, you first need to subsititute x=-2y+300

This then becomes: 3y=800-4t(-2y+300)

For x=-2y+300

Isolate y for 3y=800-4(-2y+300):

y=80

For x=-2y+300, subsitute y=80

x=-2*80+300= 140

So x=140