exam Maths Puzzle Numerical Ability

log10x = -3

Please solve using steps

I appreciate it:)

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exam Other Question

Remove the paranthesis.
-(3x+5y) Ver confused with this one Solve sytem of linear equation express in ordered pai (x,y) if possible use substitution or addition method

x- 5/3y=7
4/7x + y=-13/7

thanks, please show me steps

dnn