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12 questions from this quiz
A pair solved together for two unknowns
At the same time
Easy simultaneous equations
Substitution method
ax+by=cax + by = cax+by=c
When coefficients have the same sign
Six steps
Rearrange linear equation for 1 unknown
Two different solutions
To catch calculation errors
Forgetting there are two solution pairs
Factorisation, completing square, formula
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