Question

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Answer 1

Resposta:

a) y+5+y= 1350 x+y=1350

2y=1350-5 672.50+677.50= 1350

2y= 1345

y=1345/2

y=677,50

x+677,50= 1350

x=1350-677,50

×=672.50

b) só fazer o inverso

onde o X= 677.50

y= 672.50

c) 50x+30y=1350

50. (y+5) + 30y=1350

50y +250+30y=1350

80y=1350-250

80y=1110

y=13,75

x=y+5

x= 13.75+5

x=18.75

d)o inverso tbm...

x= 13.75

y= 18.75