exam Maths Puzzle Numerical Ability

Here is my question.
1. 0.4x+1≤1.2 x-8
Solution is {x∣x ??

2. -0.9x <-18
Solution is x??

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exam Other Question

A manufacturer produces two models of the same toy, Model A and Model B. Model A takes 4 hours to produce and costs $8 each. Model B takes 3 hours to produce and costs $7 each. I A business invest $10,000 in a saving account for two years. At the beginning of the second year, and additional $3500 is invested. At the end of the second year, the acount balan