Answer to Question 1

Substitution Method:
substitute x = 8 into the other equation and solve.

x = 8
3x + 4y = 16

3(8) + 4y = 16
24 + 4y = 16
4y = -8
y = -2

Check: 3(8) + 4(-2) = 16
24 - 8 = 16
16 = 16

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