shanea1
shanea1
16-08-2017
Mathematics
contestada
How man y kilometers traveled by bike ?
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apologiabiology
apologiabiology
16-08-2017
total was 200
x+y=200
biking was 40 mor than bus
x=40+y
subsitute 40+y for x in other equation
x+y=200
40+y+y=200
40+2y=200
minus 40 both sides
2y=160
divide both sides by 2
y=80
sub back
x=40+y
x=40+80
x=120
120km biked
80km on bus
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