Question

Resuelve en Método de suma y resta. c) 4x – 10y = 40 3x + 5y = 5

Answer 1

4x - 10y = 40 ... (a)

3x + 5y  =   5 ... (b)

sumamos (a) + 2(b)

4x - 10y = 40

6x + 10y =  10

=

10x = 50

x = 5

reemplazamos en (a)

20 - 10y = 40

-10y = 20

y = -2

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