Question

Решите
∣5−2x∣=4∣5−2x∣=4
7=∣3x+8∣7=∣3x+8∣

Answer 1

$|5-2x|=4\ \ left { {{5-2x=4} atop {5-2x=-4}} right. =>left { {{2x=1} atop {2x=9}} right. =>left { {{x=frac{1}{2} } atop {x=frac{9}{2} }} right.$

$|3x+8|=7\ \ left { {{3x+8=7} atop {3x+8=-7}} right. =>left { {{3x=-1} atop {3x=-15}} right. =>left { {{x=-frac{1}{3} } atop {x=-5}} right.$