I stumbled upon this question: "Rewrite |5x+7| < 10 as double inequality".
My attempt:
5x+7 < 10 and (-5x+7)<10
5x < 3 and -5x<17
x <3/5 and x>17/ 5
Is that the solution? The given options are :
a. -10> 5x +7 >10
b. -10< 5x+7<10
c. -10 < 5x+7>10
d. 0<5x+7<10
(I know c and a are wrong because of the direction of the greater than sign. To me b. seems right)