exam Maths Puzzle Numerical Ability

Estimate: 25.78 + 240.22 + 800.36 + 4.322 + 0.9142

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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 =)
Simplify: log9(9^2x-3)