Answer:
x = 1, y = 5
Step-by-step explanation:
- 10x + 3y = 5 → (1)
x = y - 4 → (2)
Substitute x = y - 4 into (1)
- 10(y - 4) + 3y = 5 ← distribute parenthesis and simplify left side
- 10y + 40 + 3y = 5
- 7y + 40 = 5 ( subtract 40 from both sides )
- 7y = - 35 ( divide both sides by - 7 )
y = 5
Substitute y = 5 into (2)
x = 5 - 4 = 1
