4. Solve the following equation and write your solution as a solution set. 3 + |7-4x| = 15 5. Solve the following inequality and write the solution set in interval notation. |8x+2| < 14
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Originally Posted by mjfaris 4. Solve the following equation and write your solution as a solution set. 3 + |7-4x| = 15 5. Solve the following inequality and write the solution set in interval notation. |8x+2| < 14 3 + |7-4x| = 15 |7-4x| = 15 -3 |7-4x| = 12 so 7-4x = 12 or 7-4x = -12 x = -5/4 , x = 19/4 x ={-5/4,19/4} the inequality |8x+2| < 14 |x| < a that means -a< x < a -14 < 8x+2 < 14 -16 < 8x < 12 -2 < x < 3/2 $\displaystyle x\in$(-2 , 3/2)
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