Question

resolva os seguintes sistemas ;
a) 2x-y=3
4x+2y=34

b) x+2y=240
2x+3y=405​

Answer 1

Resposta:

2x-y=3

4x+2y=34

2.5-y=3 4x-2y=6

10-y=3 +4x+2y=34

Y=-3+10 8x+0y=40

(Y=7 ) x=40/8

(X=5)

X+2y=240 - 2x-4y=-480

2x+3y=405 +2x+3y=405

X+2.75=240 - y=-75

X=240-150 ( y=75)

(X=90)