exam Maths Puzzle Numerical Ability

Problem number 31.
x+4<5

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exam Other Question

Can you show me how to simplify or solve for "x" in the following equations?

3(x+2)=-2(x+4)



2(x+1)=4-3(2x+1)



2(x+1)-3(x+7)=2



-3.6x+3.1=3(5.2-1.2x)


I would appreciate the help! Thank You =)
State the domain of the following:

f(x)= square root x+4