Exercises 85-96: Checking Symbolic Skills (Refer to Example 4.) Solve the equation for y. Determine if y is a function of x. 85. y = x 86. y = 3x 88. 1- x = 9y2 + 5x * +y = y- 2 87. 2 – 4y? = x 89. 4x² + 3y = y + 1 3. 90. 91. 3y = 2x – y 92 . x + 3y 93. x² + (y – 3) = 9 94. (x + 2)° + (y + 1)² = 1 2.

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