−2∣5w−7∣+9=−7
−2∣5w−7∣ + 9 = −7 subtract 9 from both sides
-2 l 5w - 7 l = - 16 divide both sides by -2
l 5w - 7 l = 8 we have two equations
5w - 7 = 8 5w - 7 = - 8
add 7 to both sides
5x = 15 5x = - 1
divide both sides by 5
x = 3 or x = - 1 / 5
