exam Maths Puzzle Numerical Ability

4(x-1)=13-2(x-4)

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exam Other Question

Solve each exponent equation. Let y= Savings after x years, a=initial investment, b=growth factor. Round all decimals to the nearest hundredth. Solve by graphing if necessary.

3
Please help me answer this: abs(4a+7)<13
I got -5