Question

Determine el valor de X. Si a= 20x + 3y B = 7 -3x Determine el valor de X. Si a = 20x + 3y B = 7 -3x​

Answer 1

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$\left \{{{a = 20x + 3y}} \atop{b = 7 - 3x \: \: \: \: } \right.$

$\bf \left \{{{20x + 3y = a}} \atop {x = \frac{7}{3} - \frac{b}{3} \: \: \: \: }\right.$

$\bf \left \{{{ - x - \frac{3}{20}y = - \frac{a}{20} }} \atop{x = \frac{7}{3} - \frac{b}{3} \: \: \: \: \: } \right.$

$\bf{y = \frac{a}{3} - \frac{140}{9} + \frac{20b}{9} }$

$\boxed{ \bf(x,y) = ( \frac{7}{3} - \frac{b}{3}, \frac{a}{3} - \frac{140}{9} + \frac{20b}{9} )}$

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