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When should you use a multiplication to solve a system of linear equestions by elimination?
Wiki User
∙ 8y ago
When the coefficients of the variables in the linear equations are different.
If
eqn(A): ax + by+ cz + ... = m, and
eqn(B): px + qy + rz + ... = n
where x, y z are variables and the rest are constants, then
p*eqn(A) = pax + pby+ pcz + ... = pm and
a*eqn(B) = apx + aqy + arz + ... = an
The coefficients of x, pa and ap, are equal and so subtracting one equation from the other will eliminate x.
Wiki User
∙ 8y ago
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