exam Maths Puzzle Numerical Ability

7 + 3(-2) - 4/2 +1 =

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exam Other Question

-4/6z + 2=30, I need to help my son write this out and be able to explain the steps to him. thanks in advance for the help I feel so blessed to have run upon this website. Coull you please solve this compund equality, and write the solution set using interval notation:
x>7 and x<14

Thanxs a bunch.