✒️SUBSTITUTION

x = 3 and y = 4

Step1 : Solvex+y=7for x:

x + y = 7

x + y + -y = 7 + −y (Add -y to both sides)

x = −y + 7

Step 2: Substitute −y + 7 for x in x + 2y = 11:

x + 2y = 11

−y + 7 + 2y = 11

y + 7 = 11 (Simplify both sides of the equation)

y + 7 + −7 = 11 + -7 (Add -7 to both sides)

y = 4

Step 3: Substitute 4 for y in x = −y + 7:

x = −y + 7

x = −4 + 7

x = 3 (Simplify both sides of the equation)

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