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Simultaneous Equations - Logarithms

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More Lessons for A Level Maths
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Examples, solutions, videos, activities, and worksheets that are suitable for A Level Maths to help students learn how to solve exponential and logarithmic simultaneous equations.

Solving exponential equations
Solving exponential equations where a substitution is needed and exponential simultaneous equations.
1. Solve the equation
2x + 21-x = 3

2. Solve the simultaneous equations
3x × 9y = 1
22x × 4y = 1/8

How to solve simultaneous equations that use logarithms?
Solve the simultaneous equations
log3x + log3y = 2
log3(2y - 3) - 2log9x = 1

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