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10 cards from this deck
System of two or more equations with fixed solutions or unsolvable
Remove one variable by matching coefficients
Make coefficients of one variable equal
Add or subtract the equations
Solve for remaining variable
Substitute into original equation to find other
ax+by=kax + by = kax+by=k, cx+dy=mcx + dy = mcx+dy=m
a,b,c,d,k,minmathbbRa, b, c, d, k, m in mathbb{R}a,b,c,d,k,minmathbbR
To match coefficients of one variable
Fixed set or none (unsolvable)
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