Solve the following system: y = x + 3
4x + y = 18

(6, 3)

(3, 6)

(−3, 6)

(3, −6)

B. (3, 6)

Step-by-step explanation:

y = x + 3

4x + y = 18

4x + x + 3 = 18

5x = 18 - 3

5x = 15

x = 3

y = x + 3 = 3 + 3 = 6

(3, 6)

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

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