Answer:
x = 3
y = 2
Step-by-step explanation:
5x + 4y= 23
x - y = 1 then x = y + 1
substitute for x:
5(y + 1) + 4y = 23
simplify:
9y = 18
x = 2 + 1 = 3
check:
3-2 = 1
1 = 1
and:
5(3) + 4(2) = 23
23 = 23
