If R=5Z then 15Z=3Y, then R=? Show work please

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

Which equation matches the graph shown ?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4