exam Maths Puzzle Numerical Ability

-x<7 or 3x+1<-20
My answer
x>-7 or x<-7

(-7,+ INF) or (-INF,-7)

My question is this allowed or is it no solution

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exam Other Question

how do you add and subtract negative integers and positive such as:
-5-(-4)-6 and -5-9-(-67)
I need help! i got a C in algebra and i may have to switch schools for that so plae Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, an