please help me its about solving system by substitution

Answer:
(-3, 4)
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Equality Properties
Algebra I
Step-by-step explanation:
Step 1: Define Systems
y = -x + 1
2x + 3y = 6
Step 2: Solve for x
Substitution
Step 3: Solve for y